Y a-t-il un moyen de mettre en évidence une section d'une rivière qui se trouve dans une superposition de tracé de densité de noyau ?

Question

<\/HEAD>J'ai donc deux classes d'entités .shp (Rivers et River use) ainsi qu'une couche Raster, qui est une densité de noyau de River use > 0. <\/P> Y a-t-il un moyen de changer la couleur des polygones de la rivière là où la densité de noyau superposée est présente (c'est-à-dire les sections de la rivière où il y a utilisation de la rivière) ?<\/P> <\/P><\/BODY><\/HTML>

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!