topic Re: Converting Raster to Polygons With Floating Raster Points in ArcMap Questions

Converting Raster to Polygons With Floating Raster Points

BradyHay — Wed, 18 Jan 2023 22:17:47 GMT

Hi all,

I'm in the process of trying to utilize ArcToolbox to convert a raster image into polygons for use in CAD. Unfortunately the raster to polygon tool won't work as the raster image contains floating raster points (32 bit). I found a potential solution of utilizing the raster calculator to convert a floating type raster to a polygon feature class but It's not under my current license (using ArcMap). I'm wondering if there's a different solution with the version I have or if I'm simply out of luck. Thanks in advance!

Re: Converting Raster to Polygons With Floating Raster Points

DanPatterson — Wed, 18 Jan 2023 22:39:45 GMT

how many decimal places do you need? 1? 2?

int(!yourraster! * 10) or int(!yourraster! * 100)

just remember to scale back the attributes in the table if needed

Re: Converting Raster to Polygons With Floating Raster Points

BradyHay — Wed, 18 Jan 2023 23:00:15 GMT

Hi Dan,

I appreciate the reply! I checked the editor options and it looks like 3 decimal places so I'm assuming I can substitute 100 as the value. I'm new to ArcGIS, is this a command to be entered into python?

Also I don't have an attribute table associated with the raster image.

Re: Converting Raster to Polygons With Floating Raster Points

DanPatterson — Thu, 19 Jan 2023 03:26:18 GMT

If you need 3 decimal places then * 1000 before taking the integer representation.

You won't have a raster attribute table because it is floating point and only integer rasters have a table.

And you want

How Raster Calculator works—ArcGIS Pro | Documentation

Re: Converting Raster to Polygons With Floating Raster Points

BradyHay — Thu, 19 Jan 2023 15:36:20 GMT

Appreciate the replies Dan. Unfortunately I'm not currently licensed to use the raster calculator (initial image). I'll have to discuss our current licensing internally in order to complete the task.