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GIS Analyst


Oct
10
revised Stereo Analyst & ArcGIS 10.1 - volume calculation
Fixed grammar
Oct
10
answered Stereo Analyst & ArcGIS 10.1 - volume calculation
Oct
10
comment Stereo Analyst & ArcGIS 10.1 - volume calculation
Do you have the 3D Analyst Extension for ArcGIS? You can create a TIN from your polygon layer to calculate volumes. Your polygon needs to be in a projected coordinate system though.
Oct
1
comment Use updatcursor to replace values in multiple fields
So, what is the script doing? What errors does it throw? Do you run it outside of ArcMap, or in the Python window?
Oct
1
comment How to properly write a txt to use as table in ArcGIS 10.1
Honestly, the text format looks just fine. It mimics a csv file which ArcMap generally handles well. One option may be to place your text file in Excel and save it out as a csv. @Chris R - you may have a good point.
Sep
12
comment Spatially join points to polygons in arcGIS
In that case, what results do you get when you join in reverse? I.e., points are your target layer. There are numerous other ways to play with your join to test how it is behaving. You may also want to try the actual Spatial Join tool since it has some different options than the right click version.
Sep
12
comment Spatially join points to polygons in arcGIS
If you are performing a One-to-Many join, then it is possible to have your results contain more features than the original. Are you using your grid layer as the base and the points layer as the join layer? If so, then the resulting layer will contain an extra count for every point that intersects the same polygon. E.g., if you have one polygon with two points in it, there will be an extra count. One polygon with four points - three extra counts, etc., etc. It appears in your case, there were 179 cases of extra counts.
Sep
9
comment Extracting flow accumulation to stream shapefile
Maybe you could convert the flow accumulation raster to a points feature class? Then create stream networks based off the flow accumulation raster, and cut up the lines according to your points layer? Or use some form of distance calculation from the lines to the points in order to attribute the streams, if the points and lines don't perfectly intersect?
Aug
29
comment Adding information from excel into ArcGIS
We need more info. Are you saying you already have a shapefile with property boundaries and you want to join your Excel table to the already existing layer? Or are you wanting to build a layer based off the Excel table? If it's the former, you need a column in both the shapefile and Excel table that are keyed to each other so that they can be joined together. If it's the latter, you will probably want coordinate info in your Excel table.
Aug
19
awarded  Constituent
Aug
14
awarded  Informed
Aug
14
comment How to show average walking distance to closest point in census tract in ArcMap?
Are you wanting to calculate the distance based on the centroids of the polygons, or the closest vertex along the polygon boundary, or...?
Aug
11
awarded  Caucus
Aug
8
comment Cripplingly Slow Performance While Georeferencing in ArcMap 10.1
Where is your data being stored? Can you upgrade to 10.2 to test differences? Are you connected to network drives?
Jul
23
comment Field is not nullable but Field is nullable Box is checked
What type is your field? Also, just a note that Null and 0 (zero) are not the same thing. Null is literally an empty cell.
Jun
20
comment Creating Thiessen polygons gives ArcGIS ERROR 000537 error in converting points to Voronoi Polygons?
You may have some errant points that fall out of the tool's extent capabilities, or there may be some other issue with the feature class. You might look at the feature class and see if there are any obvious issues, and/or attempt to repair geometry, or export the feature class to see if that fixes something. Lots of possibilities.
Jun
17
comment Problem with Elevation Profile Graph
I'm not sure why the original was weird. It could have to do with the DEM you based your elevations on, or as others have suggested, the way the lines combined. Anyway, glad the manual method worked. I'm not sure if that is the truthful answer to the question though, since it is more of a work around. Any thoughts on that moderators?
Jun
10
comment Problem with Elevation Profile Graph
Are your original lines parallel to each other before combining, or are they continuations of the same route? Also, what kind of elevation profile do you get if you just create a manual trace of the route?
Jun
3
comment shapefile damaged after editing in ArcMap 10.0
So, is there a question here? I can't tell what you want. Is your corrupted shapefile after editing repeatable? Does it corrupt every shapefile or just the one? Etc., etc.
May
25
awarded  Nice Answer