I'm trying to convert a raster layer to vector but I'm really struggling.

First it says that I have floating points rather than integers so I have I have seen you can use raster calculator to multiply the numbers to make them whole. Multiplying the points did not work, it would not let me do it - I do not know the error code right now for it but I can have a look. What I am trying to do is extract the raster from the vector but have ranges for the classifications.

I am using ArcGIS Pro but if your help requires me to use QGIS I will be happy to try. I also have seen that some kinda solutions require me to code but I have no experience with coding.

Well I am trying to convert to a vector as I want to understand the percentage of surface area which is an ideal climatic location for a species. I do not want a polygon around each pixel and want to add ranges or categories and have each pixel fit into a range so then I can have larger polygons. Or if that is not possible to extract from the raster a certain range so I can see the different areas.

  • 2
    What does your raster layer look like? You're not going to be able to efficiently vectorise a raster map if it is a continuous surface like an elevation model. Vectorised rasters are mostly when you have large areas of the same category that are better represented as a polygon. Otherwise you end up with a square polygon for each raster pixel, which is inefficient. Normally to convert to integers you'd use some sort of "round" or "trunc" function, but it would help if we could see a map of your raster, know the underlying values, and understand the reason you are vectorising it.
    – Spacedman
    Apr 4 at 9:12
  • "This did not work" is not a clear problem statement. What did you try? What resulted? How did this fail to meet your need? Please Edit the Question.
    – Vince
    Apr 4 at 13:50
  • You multiply up and pass that into the int() tool to convert it into an integer raster.
    – Hornbydd
    Apr 5 at 0:31
  • @Spacedman the raster map is not elevated. How do I present the underlying values so I can make my question clearer? Apr 6 at 10:21
  • @hornbydd could you be clearer by what you mean when you say passing it into the int() tool? Apr 6 at 10:24

Run through this doc to convert your float raster to a vector polygon feature class: https://support.esri.com/en/technical-article/000012554

Then you need to symbolize based on Quantities > Graduated Symbols based on a range.

  • I have tried to convert my floating points but I have an error on the raster calculator which is '000989 Python syntax error: file "<string>", line 1 int("file"). How do I correct this? Apr 8 at 10:07
  • It would be useful to include screenshots of the raster calculator parameters you used along with the error message. Could be a simple syntax error in the raster calc. Apr 8 at 10:11

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