Geographic Information Systems

Questions tagged [select-by-location]

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Select features based on their geographic position relative to features in another layer

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Using QGIS, how can I create attributes within a polygon layer based from a selection in that layer?

I'd like to add a column, or attribute rather, to selected rows within a polygon layer. I would simply like to make a binary system, where those that are selected receive a "1,' let's say, and all ...
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2answers
3k views

Python ArcGIS 10.0 Expanding select layer by location from point (walking selection)

I have an old ArcView 3 tool which I've been tasked with converting to Python. I'm breaking it down into stages, but there's a "walking selection" I can't trap. To put the query in context, the user ...
3
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2answers
2k views

Select polygons that do not intersect any other polygon using QGIS, GRASS, SAGA or R

I would like to select the polygons of the layer below that do not intersect with any other polygon (within the same layer). How can I do this using QGIS, GRASS, SAGA or R?
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1answer
288 views

ArcPy - Add Layer from Cursor Selection

I am trying to add layers from the fields of a reference layer using select by location and a cursor. Also, want to prompt the user with a message box asking if they want to add the selected by ...
7
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1answer
430 views

Is it possible to interrupt Select Layer By Location when first feature selected?

I´ve got a point feature class with some 7.000.000 points and I´m trying to check if any of these points is simply intersected by several polygon feature classes using 'for' loop and 'arcpy....
5
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3answers
188 views

Create points where 5 unique forest age class polygons meet

I am working with a polygon layer of forest age data (one shapefile with many features representing forest stands of different ages) trying to identify places where forest stands in 5 different age ...
3
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1answer
3k views

How to select polygons by distance to a single polygon in another layer?

I have a shapefile A with a group of polygons, lakes. Now I want to select the polygons(lakes) that are within a specific distance to a polygon in a second shapefile, B, with the polygon a city. In ...
1
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1answer
278 views

How to select landlocked countries in Africa using Select By Location?

I wish to select the landlocked countries in Africa using just Select by Location. I have already dissolved the boarders to get one big polygon and I thought I might combine these two telling ArcGIS ...
4
votes
2answers
439 views

How to select parcels in ArcPy situated in a different county than is written in the attribute table?

I have two polygon feature classes: one with parcels, the other one with counties (40 counties) I have to identify the parcels that in the attribute table belong to county 'X', but spatially they ...
1
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2answers
645 views

Iterate through each county in a shapefile, select the county and make a second selection by location - modelbuilder

The goal of my project is to create a table with two fields. The first field showing a county name and the second field listing every county that touches the boarder of the county listed in the first ...
3
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1answer
2k views

determining what polygons intersect another layer

I am attempting to establish what spatial relationship exists (if any) between two layers. I have two layers - one is a road network with a buffer of 500m, and the other is a collection of polygons ...
2
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0answers
837 views

Shapefile From Excel Sheet Crash When Selected Spatialy or By Attributes

Using ArcGIS 10.2, I am receiving an Excel sheet, on a daily basis, which contains 105 columns(Fields) and includes has X and Y values. For whatever reason (which I cannot understand) all data types ...
2
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1answer
1k views

How to export Select By Location result to Excel using Python and ArcPy?

I have been using ArcGIS for a few years now but have only started using Python scripting for ArcGIS for a month or so. I am trying to create a script and I am having a hard time trying to get it to ...
2
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1answer
121 views

Python scripting for making rings from the city center

Problem description: I have two layers: 1) [Polygon] city blocks, and 2) [Point] the city center. The City blocks layer has 110,681 records. And The city center layer has just one record because ...
1
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2answers
649 views

Selecting a polygon within polygon where part of its boundary is the same. PostGIS

I would like to know how can I select a A_polygon within B_polygon, but part of the boundary of the A_polygon touch the B_polygon boundary. In Postgis 2.0, I tried few options but they didn´t work (...
2
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3answers
252 views

How to write FIDs of points within each polygon to polygon field?

I have two feature classes one with points one with polygons (in ArcGis 10.2). Now, I want to write into a String Field of the polygon layer a list of all the Point-FIDs that are within each polygon (...
1
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0answers
76 views

Broadband coverage GIF image layer needs to be selectable (ArcGIS)

I am working on a project on Arcmap where I have 80,000 co-ordinates of postcodes and a broadband coverage map. I need to know which of the co-ordinates intersect with the coverage map. I have added ...

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