New answers tagged

0

Remove overlaps and zonal statistics will perform as expected. Extract from tool help: If the zone feature input has overlapping polygons, the zonal analysis will not be performed for each individual polygon. Since the feature input is converted to a raster, each location can only have one value. An alternative method is to process the zonal ...


0

Hourrah !! There is a function to create only OUTSIDE buffer !! my first (working) function in R !! :) # create basic function outerBuffer<-function(x){ buff<-buffer(x, width = 1, dissolve = T) e<-erase(buff,x) return(e) } # create data p1 = readWKT("POLYGON((2 2,-2 2,-2 -2,2 -2,2 2))") # apply function, create only outside buffer ...


5

There is no way to define "outside only" in gBuffer. You have to go through the additional step of turning the inner polygon to null, and for a good reason. You can use the raster::erase function to remove the internal polygon. If you really want this as part of the gBuffer function why not just write your own modification of gBuffer that adds an "outside ...


0

I have confirmed my projections and buffer are meters, and the problem I was seeing was just the fact that I was also trying to "dissolve buffer results." This caused all of my features to be dissolved into, but using the multi-part to single-part tool I just separated them back out to individual features.


1

The arcpy way of doing this would be (this method is for running two data sets at a time): After buffering each point layer, use Make Feature layer method on each point layer Define update cursor on the update layer Create a counter integer variable Within update cursor use select layer by attribute to select first update feature (FID or OID = 0 or ...


0

There is a great Q&A about it at How to set a buffer only in a specific direction? If you only have one polygon, you could do it manually by creating two sets of buffers. one for 500 and one for 250. You can extend the left and right sides of the 250 buffer polygon to the top/north part of the 500 polygon in an edit session. This would be the ...


0

All your GP tool results can be found at %APPDATA%\ESRI\Desktop10.1\ArcToolbox\History, stored as XML. If you look at the newest file in here, you can see if geoprocessing messages are still being written out. For example, in my History folder, there is a file called H12172015_080518.xml. The filename is a datestamp, so it was created on 12/17/2015 at ...


1

Points have no size, so any buffer is measured from the centroid of the point and symbol size has nothing to do with buffering. You can test this by creating a point and setting a small symbol and buffering by 5m, and then changing the symbol to something very very large and buffering again by 5m. When you measure the diameter of the buffer polygons you ...


6

Try "Select by Location" and set the trees as the Target layer. Set the buffer as the Source layer. Then, for the spatial selection method, use Are within the source layer feature or Are completely within the source layer feature. That should select all the points within the buffer. Now, you have three options: 1) In edit mode, open the 'Trees' ...



Top 50 recent answers are included