Timeline for Grouping points using grouping analysis to look at raster characteristics within overlapping buffers?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Nov 16, 2015 at 15:28 | vote | accept | user32636 | ||
| Nov 16, 2015 at 8:48 | comment | added | David W | I have edited my answer to inlcude the comments above. | |
| Nov 16, 2015 at 8:47 | history | edited | David W | CC BY-SA 3.0 |
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| Nov 14, 2015 at 8:20 | comment | added | David W | Yes, this is what I found and I thought you could only use it through a Python script. But I was wrong! You can download it and then add the tool to yout normal Toolbox. You do this by right clicking in your toolbox window and then choose Add toolbox. Find where you downloaded the tool and select the red toolbox icon file and then you can use it. Thanks, i did not know I could access the supplement that easily. BTW there is a newer download I think arcgis.com/home/item.html?id=3528bd72847c439f88190a137a1d0e67 | |
| Nov 14, 2015 at 0:15 | comment | added | user32636 | What about this? arcgis.com/home/item.html?id=b859b33c616a47d2b99b5e133942db02 | |
| Nov 13, 2015 at 20:34 | comment | added | David W | Yes, zonal statistics can't cope with overlapping zones. The solution suggested in the help is to process the zonal statistics iteratively for each of the polygon zones and collate the results. (There are python solutions but I assume that's not an option for you.) So it looks like you will have to split up your polygons into non-overlaping groups and do zonal stats on each group. The Multipart to singlepart tool can help with the split. Hope it works out - you are nearly there! | |
| Nov 13, 2015 at 19:52 | comment | added | user32636 | This is awesome! Thanks! My last question though is that when you get to step 3, some of the dissolved buffers overlap, and Im pretty sure zonal statistics cant handle that calculation, right? I've tried using this before with overlapping buffers and it just calculates portions rather than than the whole thing! Thank you! Almost there! | |
| Nov 13, 2015 at 16:24 | comment | added | David W | I have edited my answer. The grouping is not easy to do and I had some issues too! In the end the only way I could see to do it automatically in ArcMap was to add the XY coords as shown above. If you cannot get a grouping you are happy with you can always just group manually by adding a field to the villages attribute table and typing in a group number. Then you move onto step 2. | |
| Nov 13, 2015 at 16:21 | history | edited | David W | CC BY-SA 3.0 |
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| Nov 13, 2015 at 15:14 | comment | added | user32636 | Thank you David! I tried grouping analysis, but I couldn't get the grouping analysis to work correctly. It was selecting villages that were not necessarily next to each other spatially. Could you elaborate on the specifics on the grouping analysis? Delaunay triangulation or K nearest neighbors? How many groups? What do I put for the analysis field if I just want them to be grouped spatially? Etc. Thank you!!! | |
| Nov 13, 2015 at 15:13 | history | edited | David W | CC BY-SA 3.0 |
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| Nov 13, 2015 at 13:44 | history | answered | David W | CC BY-SA 3.0 |