Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Palette support #507

Draft
wants to merge 3 commits into
base: main
Choose a base branch
from
Draft

Palette support #507

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
693e63a
First pass at adding Geotiff_Palette support to the WCS servlet.
WeatherGod Sep 28, 2022
1a8970c
Make the default color be white for the geotiff color table.
WeatherGod Oct 12, 2022
c648962
Fixing some style issues
WeatherGod Apr 18, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 5 additions & 1 deletion tds/src/main/java/thredds/server/wcs/Request.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,11 @@ enum RequestEncoding {
}

enum Format {
NONE(""), GeoTIFF("image/tiff"), GeoTIFF_Float("image/tiff"), NetCDF3("application/x-netcdf");
NONE(""),
GeoTIFF("image/tiff"),
GeoTIFF_Float("image/tiff"),
NetCDF3("application/x-netcdf"),
GeoTIFF_Palette("image/tiff");

private String mimeType;

Expand Down
40 changes: 35 additions & 5 deletions tds/src/main/java/thredds/server/wcs/v1_0_0_1/WcsCoverage.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,8 @@
import com.google.common.collect.ImmutableList;
import thredds.server.wcs.Request;
import ucar.ma2.InvalidRangeException;
import ucar.ma2.DataType;
import ucar.nc2.Attribute;
import ucar.nc2.ft2.coverage.*;
import ucar.nc2.ft2.coverage.writer.CFGridCoverageWriter;
import ucar.nc2.geotiff.GeotiffWriter;
Expand All @@ -18,6 +20,7 @@
import ucar.unidata.geoloc.Projection;
import ucar.unidata.geoloc.ogc.EPSG_OGC_CF_Helper;
import javax.annotation.Nonnull;
import java.awt.Color;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
Expand Down Expand Up @@ -54,6 +57,7 @@ public WcsCoverage(@Nonnull Coverage coverage, @Nonnull CoverageCoordSys coordSy
// this.supportedCoverageFormatList.add("application/x-netcdf");
this.supportedCoverageFormatList.add(Request.Format.GeoTIFF);
this.supportedCoverageFormatList.add(Request.Format.GeoTIFF_Float);
this.supportedCoverageFormatList.add(Request.Format.GeoTIFF_Palette);
this.supportedCoverageFormatList.add(Request.Format.NetCDF3);

CoverageCoordAxis zaxis = coordSys.getZAxis();
Expand Down Expand Up @@ -139,18 +143,45 @@ public File writeCoverageDataToFile(Request.Format format, LatLonRect bboxLatLon

/////////
try {
if (format == Request.Format.GeoTIFF || format == Request.Format.GeoTIFF_Float) {
if (format == Request.Format.GeoTIFF || format == Request.Format.GeoTIFF_Float
|| format == Request.Format.GeoTIFF_Palette) {
File dir = new File(getDiskCache().getRootDirectory());
File tifFile = File.createTempFile("WCS", ".tif", dir);
if (log.isDebugEnabled())
log.debug("writeCoverageDataToFile(): tifFile=" + tifFile.getPath());

log.debug("writeCoverageDataToFile(): tifFile=" + tifFile.getPath() + " format=" + format);
// GridCoverage subset = this.coverage.makeSubset(tRange, zRange, bboxLatLonRect, 1, 1, 1); // LOOK do you need
// to subset it?
GeoReferencedArray array = coverage.readData(params);

try (GeotiffWriter writer = new GeotiffWriter(tifFile.getPath())) {
writer.writeGrid(array, format == Request.Format.GeoTIFF);
if (format == Request.Format.GeoTIFF_Palette) {
log.info("Processing Palette");
// Set the color table
Attribute flag_values_attr = coverage.findAttributeIgnoreCase("flag_values");
Attribute flag_colors_attr = coverage.findAttributeIgnoreCase("flag_colors");
if (flag_values_attr == null || flag_colors_attr == null) {
// FIXME: Maybe use info from supplied styling info?
log.error("Requested a paletted geotiff, but could not find a color table");
throw new WcsException(WcsException.Code.UNKNOWN, "",
"No color table found for coverage [" + this.coverage.getName() + "] for format GeoTIFF_Palette.");
}
if (!flag_colors_attr.isString()) {
log.error("Invalid flag_colors attribute");
throw new WcsException(WcsException.Code.UNKNOWN, "", "Invalid flag_colors attribute for coverage ["
+ this.coverage.getName() + "] for format GeoTIFF_Palette.");
}

int[] flag_values = new int[flag_values_attr.getLength()];
for (int i = 0; i < flag_values.length; i++) {
flag_values[i] = flag_values_attr.getNumericValue(i).intValue();
log.info("flag_values[i]=" + flag_values[i] + " i=" + i);
}
String[] flag_colors = flag_colors_attr.getStringValue().split("\\s+");
log.info("flag_values count:" + flag_values.length + " flag_colors count:" + flag_colors.length);
writer.setColorTable(GeotiffWriter.createColorMap(flag_values, flag_colors), Color.white);
}
writer.writeGrid(array, format == Request.Format.GeoTIFF,
format == Request.Format.GeoTIFF_Palette ? DataType.UBYTE : null);

} catch (Throwable e) {
log.error("writeCoverageDataToFile(): Failed to write file for requested coverage <" + this.coverage.getName()
Expand All @@ -160,7 +191,6 @@ public File writeCoverageDataToFile(Request.Format format, LatLonRect bboxLatLon
}

return tifFile;

} else if (format == Request.Format.NetCDF3) {
File dir = new File(getDiskCache().getRootDirectory());
File outFile = File.createTempFile("WCS", ".nc", dir);
Expand Down
Loading