Raster to vector conversion problems

Discussion created by camlukos on Feb 14, 2014
Latest reply on Feb 19, 2014 by camlukos

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Hello everyone
I am a first time forum poster so Im a little new to everything so I apologize in advance if I foul things up. I am a college student who is using ArcGIS to complete my senior thesis and I have encountered a problem. I am still a novice so the answer might be obvious. My problem is that I have temperature data that is in a raster format and I am trying to convert it to vector. When I used the conversion tool it generated the polygon but it did not carry over any of the temperatures. The temperature data has a resolution of about 800 meters and it does cover a large area. It spans the west coast of the united states. I was wondering how to resolve the issue of the tool not carrying my temperature to the new vector format? Could a join/relate be a way?

Thank you
Cam

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jimcousins Feb 18, 2014 7:27 AM

Cameron, without knowing what you wish to do with the data, answers are a bit of a shot in the dark.
But:
You could contour the raster data and use the resulting contour lines to your map (it will have the contour value as an attribute).
You could convert the raster to points. Based on your comment, you would have a grid of points at approx 800m spacing with the raster cell value as an attribute.
If you simply want to display the information, what about simply classifying the raster and displaying that on your map?

Do you really need vector data, if so why? If you are doing further analysis, provide some more information, and you will get a more targeted response.
Best Regards,
Jim

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camlukos Feb 19, 2014 11:22 AM

It is hard for me to describe what I will be doing with the data since I myself am still deciding. It was recommended by my friend to work in vector instead. I think I may have discovered what the issue is though. When I ran the raster to polygon tool it generated the polygon but did not have the values listed. When I looked at the attribute table for my raster the column that had my values were similar if not the same as the gridcode column on the new polygon attribute table. Could it be that it took my values and relabeled it? the raster data is already displayed via the classes but I want to be able to run vector tools like merge etc on it.

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2 Replies

jimcousins Feb 18, 2014 7:27 AM
Cameron, without knowing what you wish to do with the data, answers are a bit of a shot in the dark.
But:
You could contour the raster data and use the resulting contour lines to your map (it will have the contour value as an attribute).
You could convert the raster to points. Based on your comment, you would have a grid of points at approx 800m spacing with the raster cell value as an attribute.
If you simply want to display the information, what about simply classifying the raster and displaying that on your map?

Do you really need vector data, if so why? If you are doing further analysis, provide some more information, and you will get a more targeted response.
Best Regards,
Jim
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camlukos Feb 19, 2014 11:22 AM
It is hard for me to describe what I will be doing with the data since I myself am still deciding. It was recommended by my friend to work in vector instead. I think I may have discovered what the issue is though. When I ran the raster to polygon tool it generated the polygon but did not have the values listed. When I looked at the attribute table for my raster the column that had my values were similar if not the same as the gridcode column on the new polygon attribute table. Could it be that it took my values and relabeled it? the raster data is already displayed via the classes but I want to be able to run vector tools like merge etc on it.
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