Raster processing and digital elevation models #890
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baremaps-core/src/main/java/org/apache/baremaps/tilestore/raster/BicubicInterpolation.java
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baremaps-core/src/main/java/org/apache/baremaps/tilestore/raster/GeoTiffReader.java
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...ps-core/src/test/java/org/apache/baremaps/tilestore/raster/VectorHillshadeTileStoreTest.java
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baremaps-dem/src/test/java/org/apache/baremaps/dem/HillShadeRenderer.java
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baremaps-gdal/src/main/java/org/apache/baremaps/gdal/TranslateOptions.java
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bchapuis
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baremaps-gdal/src/main/java/org/apache/baremaps/gdal/TranslateOptions.java
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bchapuis
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| var tileStoreSupplier = (Supplier<TileStore>) () -> tileCache; | ||
| var tileStoreSupplier = (Supplier<TileStore<ByteBuffer>>) () -> tileCache; |
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A<B> = slippery slope but looks good and makes sense.
baremaps-core/src/main/java/org/apache/baremaps/tilestore/raster/GeoTiffReader.java
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baremaps-core/src/main/java/org/apache/baremaps/tilestore/raster/RasterTileCache.java
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| var grid = geoTiffReader.read(tileCoord, 256, 4); | ||
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| int increment = switch (tileCoord.z()) { | ||
| case 1 -> 2000; |
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Maybe link (in javadoc) to some justification behind the reasoning of this mapping, rather than leaving "magic" numbers.
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| /** | ||
| * A geometry transformer that applies the Chaikin smoothing algorithm to the coordinates of a | ||
| * geometry. |
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Maybe a link explaining why/when to use this algorithm.
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I improved the description of the chaikin smoother.
| import javax.swing.*; | ||
| import org.locationtech.jts.geom.Geometry; | ||
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| public class ContourRenderer { |
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Javadoc especially important since it has a main()
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I added some javadoc, but I don't intend to move this class out of the test directory.
| import org.locationtech.jts.geom.Polygon; | ||
| import org.locationtech.jts.geom.util.AffineTransformation; | ||
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| public class MarchingSquareRenderer extends JPanel { |
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Javadoc especially since it has a main()
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Same here, I added some javadoc, but this class will remain in the test directory.
- The idea is to access gdal in a more idiomatic way. - For instance AutoCloseable is used to release the underlying resources systematically. - Objects ease the creation of options.
- The ContourTracer implements marching squares to trace or polygonize contours. - The HillshadeCalculator computes raster hillshades. - Martini is a port of mapbox's martini algorithm to java. - The ChaikinSmoother enable the smoothing of linestring and polygons. - Some tests and utilities enable the verification of the results.
- Improve the TileStore abstraction so that it can support both raster and vector tiles. - Add some TileStore for dealing with raster tiles (geotiff, dem, cache, etc.).
- The server can now serve raster and vector tiles. - New assets allow the previsualisation of DEM data
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@sebr72 Thanks a lot for the thorough review. I think I addressed most of your comments before squashing and merging. |
This pull request adds the ability to handle raster data and digital elevation models to produce vector contour and vector hillshades. Apache SIS is used to read raster data. While not used in core, a wrapper for GDAL has also been developped and may be used in workflow steps in the future. A few algorithms for converting raster data to vectors are also introduced.
The screenshot below depicts the convertion of a dem geotiff as terrarium png tiles, the creation of a raster hillshade, the creation of a vector hillshade, and the creation of vector contours.