Is there a way to highlight a section of a river that falls withing an overlaying kernel density plot?

Question

So I have two .shp feature classes (Rivers and River use) as well as a Raster layer, which is a kernel density of River use > 0.

Is there a way to change the color of the river polygons where overlaying kernel density is present (ie. sections of river where there is river use)?

SuzanneBoden · Answer

Awesome, Christopher! Your map clearly shows river section use. Thanks for sharing the solution.

Anonymous User · Answer

I have found a way to do this that is exactly what I was hoping for.

Step 1.) Use Reclassify tool on the Kernal Density Raster layer

Step 2.) Use the Raster to Polygon tool

Step 3.) Select by attributes on new layer

Step 4.) Export  selected data to new layer.

Step 5.) Use the intersect tool

JimJones_0-1652112633603.png

Robert_LeClair · Answer

One way that comes to mind:

* Convert your Rivers polygon to a raster using the Feature to Raster GP tool.  The FIELD parameter will assign the cell value to the raster.  This could be a "dummy" field in the feature class calc'ed to one for example.
* Then run the Mosaic to New Raster GP tool.  The first input could be your DENSITY raster.  The second input is your Lakes raster.  For the MOSAIC OPERATOR parameter, this could be set to FIRST.  So wherever the 2 rasters overlap, the value from the first raster, DENSITY, is used for the output cells in the new output raster dataset.  If there is no overlap, then cell values are derived from the DENSITY and LAKES raster respectively.
* Then add your new raster dataset to a map and symbolize accordingly.  The dummy cell values for the lake are blue and other density cell values get their red color ramp colors.

Should work!