moved converter to one file
This commit is contained in:
afischerdev
parent
50eb62361d
commit
5198559c77
1 changed files with 546 additions and 0 deletions
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@ -0,0 +1,546 @@
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package btools.mapcreator;
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import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.BufferedReader;
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import java.io.DataInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.util.Arrays;
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import java.util.Locale;
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import java.util.StringTokenizer;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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public class ElevationRasterTileConverter {
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public static final boolean DEBUG = false;
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public static final short NODATA2 = -32767; // hgt-formats nodata
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public static final short NODATA = Short.MIN_VALUE;
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private static final String HGT_FILE_EXT = ".hgt";
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private static final int HGT_BORDER_OVERLAP = 1;
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private static final int HGT_3ASEC_ROWS = 1201; // 3 arc second resolution (90m)
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private static final int HGT_3ASEC_FILE_SIZE = HGT_3ASEC_ROWS * HGT_3ASEC_ROWS * Short.BYTES;
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private static final int HGT_1ASEC_ROWS = 3601; // 1 arc second resolution (30m)
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private static final int SRTM3_ROW_LENGTH = 1200; // number of elevation values per line
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private static final int SRTM1_ROW_LENGTH = 3600;
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private static final boolean SRTM_NO_ZERO = true;
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private int NROWS;
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private int NCOLS;
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private int ROW_LENGTH;
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private short[] imagePixels;
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/**
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* This generates elevation raster files with a 5x5 degree scope
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* The output can be for 1sec (18000x18000 points)
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* or for 3sec (6000x6000 points)
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* When using 1sec input files a not found area can be called from 3sec pool
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* The input can be 1x1 degree 1sec/3sec hgt files (also packed as zip)
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* or 5x5 degree 3sec asc files (delivered as zip)
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* Arguments for single file generation:
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* ElevationRasterTileConverter <srtm-filename | all> <hgt-data-dir> <srtm-output-dir> [arc seconds (1 or 3,default=3)] [hgt-fallback-data-dir]
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* Samples
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* $ ... ElevationRasterTileConverter srtm_34_-1 ./srtm/hgt3sec ./srtm/srtm3_bef
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* $ ... ElevationRasterTileConverter srtm_34_-1 ./srtm/hgt1sec ./srtm/srtm1_bef 1
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* $ ... ElevationRasterTileConverter srtm_34_-1 ./srtm/hgt1sec ./srtm/srtm1_bef 1 ./srtm/hgt3sec
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* <p>
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* Arguments for multi file generation (world wide):
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* $ ... ElevationRasterTileConverter all ./srtm/hgt3sec ./srtm/srtm3_bef
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* $ ... ElevationRasterTileConverter all ./srtm/hgt1sec ./srtm/srtm1_bef 1
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* $ ... ElevationRasterTileConverter all ./srtm/hgt1sec ./srtm/srtm1_bef 1 ./srtm/hgt3sec
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*
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* @param args
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* @throws Exception
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*/
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public static void main(String[] args) throws Exception {
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if (args.length == 3 || args.length == 4 || args.length == 5) {
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String filename90 = args[0];
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if ("all".equals(filename90)) {
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//if (DEBUG)
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System.out.println("raster convert all ");
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new ElevationRasterTileConverter().doConvertAll(args[1], args[2], (args.length > 3 ? args[3] : null), (args.length == 5 ? args[4] : null));
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return;
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}
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// old filenames only
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String filename30 = filename90 + ".bef"; //filename90.substring(0, filename90.length() - 3) + "bef";
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int srtmLonIdx = Integer.parseInt(filename90.substring(5, 7).toLowerCase());
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int srtmLatIdx = Integer.parseInt(filename90.substring(8, 10).toLowerCase());
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int ilon_base = (srtmLonIdx - 1) * 5 - 180;
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int ilat_base = 150 - srtmLatIdx * 5 - 90;
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int row_length = SRTM3_ROW_LENGTH;
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String fallbackdir = null;
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if (args.length > 3) {
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row_length = (Integer.parseInt(args[3]) == 1 ? SRTM1_ROW_LENGTH : SRTM3_ROW_LENGTH);
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fallbackdir = (args.length == 5 ? args[4] : null);
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}
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//if (DEBUG)
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System.out.println("raster convert " + ilon_base + " " + ilat_base + " from " + srtmLonIdx + " " + srtmLatIdx + " f: " + filename90 + " rowl " + row_length);
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new ElevationRasterTileConverter().doConvert(args[1], ilon_base, ilat_base, args[2] + "/" + filename30, row_length, fallbackdir);
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} else {
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System.out.println("usage: java <srtm-filename> <hgt-data-dir> <srtm-output-dir> [arc seconds (1 or 3,default=3)] [hgt-fallback-data-dir]");
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System.out.println("or java all <hgt-data-dir> <srtm-output-dir> [arc seconds (1 or 3, default=3)] [hgt-fallback-data-dir]");
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return;
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}
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}
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private void doConvertAll(String hgtdata, String outdir, String rlen, String hgtfallbackdata) throws Exception {
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int row_length = SRTM3_ROW_LENGTH;
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if (rlen != null) {
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row_length = (Integer.parseInt(rlen) == 1 ? SRTM1_ROW_LENGTH : SRTM3_ROW_LENGTH);
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}
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String filename30;
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for (int ilon_base = -180; ilon_base < 180; ilon_base += 5) {
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for (int ilat_base = 85; ilat_base > -90; ilat_base -= 5) {
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if (PosUnifier.UseRasterRd5FileName) {
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filename30 = genFilenameRd5(ilon_base, ilat_base);
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} else {
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filename30 = genFilenameOld(ilon_base, ilat_base);
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}
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if (DEBUG)
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System.out.println("lidar convert all: " + filename30);
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doConvert(hgtdata, ilon_base, ilat_base, outdir + "/" + filename30, row_length, hgtfallbackdata);
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}
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}
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}
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static String genFilenameOld(int ilon_base, int ilat_base) {
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int srtmLonIdx = ((ilon_base + 180) / 5) + 1;
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int srtmLatIdx = (60 - ilat_base) / 5;
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return String.format(Locale.US, "srtm_%02d_%02d.bef", srtmLonIdx, srtmLatIdx);
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}
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static String genFilenameRd5(int ilon_base, int ilat_base) {
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return String.format("srtm_%s_%s.bef", ilon_base < 0 ? "W" + (-ilon_base) : "E" + ilon_base,
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ilat_base < 0 ? "S" + (-ilat_base) : "N" + ilat_base);
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}
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private void readHgtZip(String filename, int rowOffset, int colOffset, int row_length, int scale) throws Exception {
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ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(filename)));
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try {
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for (; ; ) {
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ZipEntry ze = zis.getNextEntry();
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if (ze == null) break;
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if (ze.getName().toLowerCase().endsWith(HGT_FILE_EXT)) {
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readHgtFromStream(zis, rowOffset, colOffset, row_length, scale);
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return;
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}
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}
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} finally {
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zis.close();
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}
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}
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private void readHgtFromStream(InputStream is, int rowOffset, int colOffset, int rowLength, int scale)
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throws Exception {
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DataInputStream dis = new DataInputStream(new BufferedInputStream(is));
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for (int ir = 0; ir < rowLength; ir++) {
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int row = rowOffset + ir * scale;
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for (int ic = 0; ic < rowLength; ic++) {
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int col = colOffset + ic * scale;
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int i1 = dis.read(); // msb first!
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int i0 = dis.read();
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if (i0 == -1 || i1 == -1)
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throw new RuntimeException("unexpected end of file reading hgt entry!");
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short val = (short) ((i1 << 8) | i0);
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if (val == NODATA2) {
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val = NODATA;
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}
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if (scale == 3) {
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setPixel(row, col, val);
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setPixel(row + 1, col, val);
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setPixel(row + 2, col, val);
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setPixel(row, col + 1, val);
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setPixel(row + 1, col + 1, val);
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setPixel(row + 2, col + 1, val);
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setPixel(row, col + 2, val);
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setPixel(row + 1, col + 2, val);
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setPixel(row + 2, col + 2, val);
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} else {
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setPixel(row, col, val);
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}
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}
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}
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}
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private void readHgtFile(File file, int rowOffset, int colOffset, int row_length, int scale)
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throws Exception {
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if (DEBUG)
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System.out.println("read: " + file + " " + row_length);
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FileInputStream fis = new FileInputStream(file);
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try {
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readHgtFromStream(fis, rowOffset, colOffset, row_length, scale);
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} finally {
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fis.close();
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}
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}
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/*
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private void readFallbackFile(File file, int rowOffset, int colOffset, int row_length)
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throws Exception {
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int rowLength;
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int scale;
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if (file.length() > HGT_3ASEC_FILE_SIZE) {
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rowLength = HGT_1ASEC_ROWS;
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scale = 1;
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} else {
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rowLength = HGT_3ASEC_ROWS;
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scale = 3;
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}
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if (DEBUG)
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System.out.println("read fallback: " + file + " " + rowLength);
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FileInputStream fis = new FileInputStream(file);
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try {
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readHgtFromStream(fis, rowOffset, colOffset, rowLength, scale);
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} finally {
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fis.close();
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}
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}
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*/
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private void readAscZip(File file, ElevationRaster raster) throws Exception {
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ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(file)));
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try {
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for (; ; ) {
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ZipEntry ze = zis.getNextEntry();
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if (ze.getName().endsWith(".asc")) {
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readAscFromStream(zis, raster);
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return;
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}
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}
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} finally {
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zis.close();
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}
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}
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private String secondToken(String s) {
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StringTokenizer tk = new StringTokenizer(s, " ");
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tk.nextToken();
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return tk.nextToken();
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}
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private void readAscFromStream(InputStream is, ElevationRaster raster) throws Exception {
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BufferedReader br = new BufferedReader(new InputStreamReader(is));
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int linenr = 0;
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for (; ; ) {
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linenr++;
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if (linenr <= 6) {
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String line = br.readLine();
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if (linenr == 1)
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raster.ncols = Integer.parseInt(secondToken(line));
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else if (linenr == 2)
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raster.nrows = Integer.parseInt(secondToken(line));
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else if (linenr == 3)
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raster.xllcorner = Double.parseDouble(secondToken(line));
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else if (linenr == 4)
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raster.yllcorner = Double.parseDouble(secondToken(line));
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else if (linenr == 5)
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raster.cellsize = Double.parseDouble(secondToken(line));
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else if (linenr == 6) {
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// nodata ignored here ( < -250 assumed nodata... )
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// raster.noDataValue = Short.parseShort( secondToken( line ) );
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raster.eval_array = new short[raster.ncols * raster.nrows];
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}
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} else {
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int row = 0;
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int col = 0;
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int n = 0;
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boolean negative = false;
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for (; ; ) {
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int c = br.read();
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if (c < 0)
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break;
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if (c == ' ') {
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if (negative)
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n = -n;
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short val = n < -250 ? Short.MIN_VALUE : (short) (n);
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raster.eval_array[row * raster.ncols + col] = val;
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if (++col == raster.ncols) {
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col = 0;
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++row;
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}
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n = 0;
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negative = false;
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} else if (c >= '0' && c <= '9') {
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n = 10 * n + (c - '0');
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} else if (c == '-') {
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negative = true;
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}
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}
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break;
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}
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}
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br.close();
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}
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private void setPixel(int row, int col, short val) {
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if (row >= 0 && row < NROWS && col >= 0 && col < NCOLS) {
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imagePixels[row * NCOLS + col] = val;
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}
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}
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private short getPixel(int row, int col) {
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if (row >= 0 && row < NROWS && col >= 0 && col < NCOLS) {
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return imagePixels[row * NCOLS + col];
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}
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return NODATA;
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}
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public void doConvert(String inputDir, int lonDegreeStart, int latDegreeStart, String outputFile, int row_length, String hgtfallbackdata) throws Exception {
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int extraBorder = 0;
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//List<String> foundList = new ArrayList<>();
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//List<String> notfoundList = new ArrayList<>();
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boolean hgtfound = false;
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boolean ascfound = false;
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String filename = null;
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//if (row_length == SRTM1_ROW_LENGTH)
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{
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// check for sources w/o border
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for (int latIdx = 0; latIdx < 5; latIdx++) {
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int latDegree = latDegreeStart + latIdx;
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for (int lonIdx = 0; lonIdx < 5; lonIdx++) {
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int lonDegree = lonDegreeStart + lonIdx;
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filename = inputDir + "/" + formatLat(latDegree) + formatLon(lonDegree) + ".zip";
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File f = new File(filename);
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if (f.exists() && f.length() > 0) {
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hgtfound = true;
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break;
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}
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filename = filename.substring(0, filename.length() - 4) + ".hgt";
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f = new File(filename);
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if (f.exists() && f.length() > 0) {
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hgtfound = true;
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break;
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}
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}
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}
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if (!hgtfound) {
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filename = inputDir + "/" + genFilenameOld(lonDegreeStart, latDegreeStart).substring(0, 10) + ".zip";
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File f = new File(filename);
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if (f.exists() && f.length() > 0) {
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ascfound = true;
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}
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}
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}
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if (hgtfound) { // init when found
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NROWS = 5 * row_length + 1 + 2 * extraBorder;
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NCOLS = 5 * row_length + 1 + 2 * extraBorder;
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imagePixels = new short[NROWS * NCOLS]; // 650 MB !
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// prefill as NODATA
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Arrays.fill(imagePixels, NODATA);
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} else if (!ascfound) {
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if (DEBUG)
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System.out.println("none data: " + lonDegreeStart + " " + latDegreeStart);
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return;
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}
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if (hgtfound) {
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for (int latIdx = -1; latIdx <= 5; latIdx++) {
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int latDegree = latDegreeStart + latIdx;
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int rowOffset = extraBorder + (4 - latIdx) * row_length;
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for (int lonIdx = -1; lonIdx <= 5; lonIdx++) {
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int lonDegree = lonDegreeStart + lonIdx;
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int colOffset = extraBorder + lonIdx * row_length;
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filename = inputDir + "/" + formatLat(latDegree) + formatLon(lonDegree) + ".zip";
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File f = new File(filename);
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if (f.exists() && f.length() > 0) {
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if (DEBUG)
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System.out.println("exist: " + filename);
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readHgtZip(filename, rowOffset, colOffset, row_length + 1, 1);
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continue;
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}
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filename = filename.substring(0, filename.length() - 4) + ".hgt";
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f = new File(filename);
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if (f.exists() && f.length() > 0) {
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if (DEBUG)
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System.out.println("exist: " + filename);
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readHgtFile(f, rowOffset, colOffset, row_length + 1, 1);
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continue;
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} else {
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if (hgtfallbackdata != null) {
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filename = hgtfallbackdata + "/" + formatLat(latDegree) + formatLon(lonDegree) + ".hgt";
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f = new File(filename);
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if (f.exists() && f.length() > 0) {
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readHgtFile(f, rowOffset, colOffset, SRTM3_ROW_LENGTH + 1, 3);
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continue;
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}
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filename = filename.substring(0, filename.length() - 4) + ".zip";
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f = new File(filename);
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if (f.exists() && f.length() > 0) {
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readHgtZip(filename, rowOffset, colOffset, SRTM3_ROW_LENGTH + 1, 3);
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} else {
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if (DEBUG)
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System.out.println("none : " + filename);
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}
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}
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}
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}
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}
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// post fill zero
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if (SRTM_NO_ZERO) {
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for (int row = 0; row < NROWS; row++) {
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for (int col = 0; col < NCOLS; col++) {
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if (imagePixels[row * NCOLS + col] == 0) imagePixels[row * NCOLS + col] = NODATA;
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}
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}
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}
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}
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boolean halfCol5 = false; // no halfcol tiles in lidar data (?)
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ElevationRaster raster = new ElevationRaster();
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if (hgtfound) {
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raster.nrows = NROWS;
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raster.ncols = NCOLS;
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raster.halfcol = halfCol5;
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raster.noDataValue = NODATA;
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raster.cellsize = 1. / row_length;
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raster.xllcorner = lonDegreeStart - (0.5 + extraBorder) * raster.cellsize;
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raster.yllcorner = latDegreeStart - (0.5 + extraBorder) * raster.cellsize;
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raster.eval_array = imagePixels;
|
||||
}
|
||||
|
||||
if (ascfound) {
|
||||
File f = new File(filename);
|
||||
readAscZip(f, raster);
|
||||
}
|
||||
|
||||
// encode the raster
|
||||
OutputStream os = new BufferedOutputStream(new FileOutputStream(outputFile));
|
||||
new ElevationRasterCoder().encodeRaster(raster, os);
|
||||
os.close();
|
||||
|
||||
// decode the raster
|
||||
InputStream is = new BufferedInputStream(new FileInputStream(outputFile));
|
||||
ElevationRaster raster2 = new ElevationRasterCoder().decodeRaster(is);
|
||||
is.close();
|
||||
|
||||
short[] pix2 = raster2.eval_array;
|
||||
if (pix2.length != raster.eval_array.length)
|
||||
throw new RuntimeException("length mismatch!");
|
||||
|
||||
// compare decoding result
|
||||
for (int row = 0; row < raster.nrows; row++) {
|
||||
int colstep = halfCol5 ? 2 : 1;
|
||||
for (int col = 0; col < raster.ncols; col += colstep) {
|
||||
int idx = row * raster.ncols + col;
|
||||
short p2 = pix2[idx];
|
||||
if (p2 != raster.eval_array[idx]) {
|
||||
throw new RuntimeException("content mismatch: p2=" + p2 + " p1=" + raster.eval_array[idx]);
|
||||
}
|
||||
}
|
||||
}
|
||||
imagePixels = null;
|
||||
}
|
||||
|
||||
private static String formatLon(int lon) {
|
||||
if (lon >= 180)
|
||||
lon -= 180; // TODO: w180 oder E180 ?
|
||||
|
||||
String s = "E";
|
||||
if (lon < 0) {
|
||||
lon = -lon;
|
||||
s = "W";
|
||||
}
|
||||
String n = "000" + lon;
|
||||
return s + n.substring(n.length() - 3);
|
||||
}
|
||||
|
||||
private static String formatLat(int lat) {
|
||||
String s = "N";
|
||||
if (lat < 0) {
|
||||
lat = -lat;
|
||||
s = "S";
|
||||
}
|
||||
String n = "00" + lat;
|
||||
return s + n.substring(n.length() - 2);
|
||||
}
|
||||
|
||||
|
||||
public ElevationRaster getRaster(File f, double lon, double lat) throws Exception {
|
||||
long fileSize;
|
||||
InputStream inputStream;
|
||||
|
||||
if (f.getName().toLowerCase().endsWith(".zip")) {
|
||||
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(f)));
|
||||
for (; ; ) {
|
||||
ZipEntry ze = zis.getNextEntry();
|
||||
if (ze == null) {
|
||||
throw new FileNotFoundException(f.getName() + " doesn't contain a " + HGT_FILE_EXT + " file.");
|
||||
}
|
||||
if (ze.getName().toLowerCase().endsWith(HGT_FILE_EXT)) {
|
||||
fileSize = ze.getSize();
|
||||
inputStream = zis;
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
fileSize = f.length();
|
||||
inputStream = new FileInputStream(f);
|
||||
}
|
||||
|
||||
int rowLength;
|
||||
if (fileSize > HGT_3ASEC_FILE_SIZE) {
|
||||
rowLength = HGT_1ASEC_ROWS;
|
||||
} else {
|
||||
rowLength = HGT_3ASEC_ROWS;
|
||||
}
|
||||
|
||||
// stay at 1 deg * 1 deg raster
|
||||
NROWS = rowLength;
|
||||
NCOLS = rowLength;
|
||||
|
||||
imagePixels = new short[NROWS * NCOLS];
|
||||
|
||||
// prefill as NODATA
|
||||
Arrays.fill(imagePixels, NODATA);
|
||||
readHgtFromStream(inputStream, 0, 0, rowLength, 1);
|
||||
inputStream.close();
|
||||
|
||||
ElevationRaster raster = new ElevationRaster();
|
||||
raster.nrows = NROWS;
|
||||
raster.ncols = NCOLS;
|
||||
raster.halfcol = false; // assume full resolution
|
||||
raster.noDataValue = NODATA;
|
||||
raster.cellsize = 1. / (double) (rowLength - HGT_BORDER_OVERLAP);
|
||||
raster.xllcorner = (int) (lon < 0 ? lon - 1 : lon); //onDegreeStart - raster.cellsize;
|
||||
raster.yllcorner = (int) (lat < 0 ? lat - 1 : lat); //latDegreeStart - raster.cellsize;
|
||||
raster.eval_array = imagePixels;
|
||||
|
||||
return raster;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
Loading…
Reference in a new issue