Questions tagged [buffer]

A region enclosing a point, line, or polygon at a specified distance.

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votes
3answers
2k views

Use buffer tool to draw different radii?

I am new to Arcmap-Arceditor 10 and could really use your help. I have been mapping ethanol plants (which utilize corn to produce ethanol) and corn production amounts in the counties of the USA. My ...
5
votes
3answers
2k views

Displaying geometry returned from ST_Buffer in PostGIS with OpenLayers?

I'm using PostGIS, GeoServer and OpenLayers, and the thing is that I want to display the geometry result from a query like this: SELECT ST_Buffer(ST_GeomFromText('POINT(100 100)'), 500); To perform ...
0
votes
2answers
494 views

how do you do a buffer analysis of a geographical location?

I want to use a buffer analysis to identify the geodemographics of Incinerators. I have downloaded the Output Area Classification (OAC) map and also know the locations of all the Incinerators I want ...
4
votes
1answer
336 views

Selecting points within 2 buffers?

I have 2 huge files of points (hundreds of thousands of points). I need to determine a way to loop through all the points in one file and find all the points in the second file that are only a ...
0
votes
6answers
6k views

Batch buffer with Python in ArcGIS 10

I have some feature classes (7 feature classes) and I want to batch buffer in ArcGIS 10. I don't know how can I buffer at once. Please help me.
3
votes
2answers
13k views

How to create a polygon buffer from a line?

I have connected a series of points into a line in ArcMap 10 with the Points to Line tool in the ArcToolbox. The line is, of course, in its own layer, and I added a 5 meter buffer around the line. It ...
1
vote
2answers
971 views

Error adding buffer to polyline in ArcMap 10

As the next step to what I did in this previous question, I would like to add a buffer to a polyline, with 5 meters on either side. I tried adding buffer to two versions of the line, one in ...
6
votes
1answer
3k views

Understanding why buffers not circular in QGIS?

I would like to select areas under a particular circular radius in QGIS. I believe this is accomplished with the buffer tool, but when I specify the radius the area is not circular. How to make them ...
3
votes
1answer
3k views

How to Buffer with intersections in QGIS

I am buffering a layer of facilities (points). I will then use the buffer to clip and intersect another layer, containing resources. I want to answer the question, how much of the resource lies ...
1
vote
2answers
511 views

Buffer in ArcView/Basic vs ArcInfo/Advanced level licenses of ArcGIS Desktop?

I have ArcGIS Desktop 9.3. Is Buffer only available with an ArcInfo (called Advanced from 10.0) or is there a way to buffer with an ArcView (called Basic from 10.0) level license?
3
votes
1answer
2k views

WARNING 000632: datum conflict when creating buffer in ArcGIS Desktop?

A buffer I created successfully executed, but I received the following message in ArcGIS Desktop 10: WARNING 000632: Datum conflict between map and output. How can I fix this?
3
votes
2answers
3k views

Using Buffer Wizard in ModelBuilder?

I am creating a model in ArcMap 10 and I need to use the Buffer Wizard tool to create multiple buffers within a polygon feature class. The problem is, I can't seem to place the Buffer Wizard within my ...
13
votes
5answers
1k views

Simulating the expansion of polygon features

I've got what I'm hoping will be an interesting question. I'm working on an assignment for an intro to GIS course that uses some Gulf oil spill data to introduce common vector-based spatial analysis ...
1
vote
2answers
4k views

“Item not found in this collection” when trying to set the Shape on IFeatureBuffer

I'm working on code to open a 3rd party data file and convert it into a collection of features in a custom layer based on FeatureLayer. I have had no issue importing the data itself (nodal data for ...
19
votes
4answers
6k views

Creating one-sided buffers or parallel lines in PostGIS?

I'm looking for a way to create so-called one-sided buffers or parallel lines in PostGIS. Example: 1. buffer, 2. one-side, 3. both-sides I've found some discussion on the mailing list from 2009 and ...
7
votes
4answers
3k views

Improving upon ArcGIS Buffer/Dissolve performance?

I'm wondering if anyone else has experienced significant performance penalties when using the ArcGIS buffer function with the 'dissolve' option on point features. My dataset is a shapefile of 260 ...
5
votes
2answers
1k views

Compound variables in Model Builder?

I'm trying to create a model wherein one of the parameters is a compound variable, that is made of multiple variables joined together. How can this be done? For example: create an insider buffer ...
7
votes
1answer
3k views

Inside buffer with attributes in ArcGIS?

How can I create buffers for polygons that: a) lie only inside the polygon boundary, and b) know who their parent is? An example of where this is useful is First Nation Traditional Territories. ...
9
votes
5answers
2k views

Buffers of public transportation transit times

I'd like to be able to create buffers/zones/rings of transit times using Denver's public transportation system. For an example of what I'm talking about, check out triptropnyc.com - I don't need it ...