Fix InterpolatedColorMap.render function

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - WMS Parent Layer default time should be omitted [#368](https://github.com/geotrellis/geotrellis-server/pull/368)
 - Fix WCS DescribeCoverage extents axis ordering [#369](https://github.com/geotrellis/geotrellis-server/pull/369)
 - Fix TIFF CellType of identity MAML Layers [#375](https://github.com/geotrellis/geotrellis-server/pull/375)
+- Fix InterpolatedColorMap.render function [#381](https://github.com/geotrellis/geotrellis-server/pull/381)
 
 ## Changed
 - OgcTime logic cleanup [#371](https://github.com/geotrellis/geotrellis-server/pull/371)

ogc/src/main/scala/geotrellis/server/ogc/style/InterpolatedColorMap.scala

@@ -30,18 +30,23 @@ case class InterpolatedColorMap(
 
   def interpolate: Double => Int = { dbl: Double => interpolation(poles, clipDefinition)(dbl) }
 
-  def render(tile: Tile): Tile =
+  def render(tile: Tile): Tile = {
+    // IntCellType is used to store interpolated colors, since the source cellType can have not enough bits to encode interpolated colors.
+    // See https://github.com/locationtech/geotrellis/blob/v3.6.0/raster/src/main/scala/geotrellis/raster/render/ColorMap.scala#L164-L176
+    val result = ArrayTile.empty(IntCellType, tile.cols, tile.rows)
     if (tile.cellType.isFloatingPoint) {
-      tile.mapDouble { cellValue: Double =>
-        if (isData(cellValue)) interpolate(cellValue)
-        else 0
+      tile.foreachDouble { (col, row, z) =>
+        if (isData(z)) result.setDouble(col, row, interpolate(z))
+        else result.setDouble(col, row, 0d)
       }
     } else {
-      tile.map { cellValue: Int =>
-        if (isData(cellValue)) interpolate(cellValue)
-        else 0
+      tile.foreach { (col, row, z) =>
+        if (isData(z)) result.setDouble(col, row, interpolate(z))
+        else result.set(col, row, 0)
       }
     }
+    result
+  }
 }
 
 object InterpolatedColorMap {

project/Dependencies.scala

@@ -19,7 +19,7 @@ object Dependencies {
 
   val dispatchVer  = "0.11.3"
   val gtVer        = "3.6.0"
-  val stac4sVer    = "0.5.0-8-gaab61a6-SNAPSHOT"
+  val stac4sVer    = "0.5.0-13-g35ad8d4-SNAPSHOT"
   val jaxbApiVer   = "2.3.1"
   val refinedVer   = "0.9.20"
   val shapelessVer = "2.3.3"