Questions tagged [intersect]

Use for questions about the ArcGIS Intersect tool

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R: Self-intersection error when using intersect with two shapefiles

I am trying to "translate" worldwide raster data to European nuts3 polygons. That means I try to overlap two shapefiles to find the average value on nuts3 level. Unfortunately, when I use the ...
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0answers
58 views

Highlight areas without overlapping Shapefies in QGIS 2.16

I have a dataset with several hundred shapefiles and need to ensure that there is at least double overlap throughout. I need a way to extract the areas without double overlap, or at least a way to ...
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2answers
2k views

Calculating proportional area of polygon within another layer's polygon using QGIS?

I have two polygon layers, model and ntem, whose features overlap and intersect one another. I would like to calculate the proportion of the area of the model polygons which fit within each ntem ...
3
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1answer
111 views

Buffer 1 to 1 relation in QGIS?

I have 2 layers ( geometric type - point), let's name it layer A and layer B. I need to find which points from layer B don't have their equivalents points from layer A. So i`ve made 10 meter buffer ...
2
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2answers
620 views

Clipping a polygon shp by one large polygon

I've seen similar answers to this question on so many forums but nothing seems to work. I have one large polygon (a country boundary) with another polygon layer that contains thousands of smaller ...
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0answers
2k views

Clip shapefile with shapefile

There are two shapefiles. One is a compilation of municipalities on the coast with borders extending into ocean. The second shapefile is a coastal border. I'm trying to clip the municipality ...
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2answers
393 views

Unable to intersect with search cursor on ArcPy?

I would like to loop through the shapes in the attribute table and create a new intersection point feature class for each row in the table. But every time I do this, I keep on getting the same error. ...
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0answers
101 views

Identifying rasters with specific attribute value that intersect polygon using ArcGIS for Desktop?

I have numerous raster files that each contain an attribute field "VALUE" that can take on the values 0 or 1. How can I identify rasters that have any of their "VALUE=1" cells intersecting a focal ...
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0answers
80 views

Create junction raster from stream and road rasters

I have converted two vector polyline datasets to raster format. One represents streams, and one represents roads. I need to create a third raster layer that contains cells where there are stream ...
1
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1answer
74 views

How to locate where shapefiles do NOT intersect? Two road datasets

I am trying to match a Canadian road dataset with a US road dataset in ArcGIS 10.1. One way to assess how complete the "matching process" is is by seeing where the roads intersect and where they do ...
2
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1answer
382 views

Cluster analysis using buffers and polygon features (NOT layer)

I have a point-based vector layer, where each point represents a road accident. I am trying to write a function that: Loops through my accident layer creates a buffer, of a given radius, around each ...
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0answers
96 views

Split disconnected polygons into separate features after using clip tool? [duplicate]

I'm working with a series of forest polygons (geodatabase feature classes), which I'm trying to clip to an area with a specific land use history (marked as "undisturbed" in the screenshot below)in ...
2
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1answer
429 views

Batch intersect and multiprocessing with arcpy

I admit what I am working on is way over my head, especially as I've only been dabbling in python for a few months. I am attempting to write a script that allows me to use Intersect analysis on about ...
4
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0answers
230 views

Counting nodata and data pixels using PostGIS

I'm using PostgreSQL 9.2.4 and PostGIS 2.0.3. I have some raster layer and I'm trying to get the count of all pixels (including nodata), cliped by polygon. Raster was imported by raster2sql: ...
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0answers
42 views

ArcMap 10.1 Intersect Not Adding Points at All Intersections

I have run the Intersect tool on a streets centerline layer. I tried it on a dissolved version of the lines and also a split version of the lines. The tool is not giving me a point at each ...
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3answers
1k views

openlayers extent intersects is not working properly

I am using ol.extent.intersects(extent1, extent2) to check for intersection between layers and polygon I drew, but it doesn't get me any intersection which is weird because I draw the polygon ...
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0answers
325 views

Double Iteration Intersect in Model Builder

I need to intersect two highly-overlapping shapefiles, the first with 60 polygons (ponds), the second with 3000 (lilly pads). A straight-up intersection does not work (60 x 3000 -- it runs for hours ...
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1answer
302 views

Intersect in QGIS returns empty shapefile

I've seen this asked and occasionally answered on the site, but none of the solutions applied. I am attempting to intersect points (i.e. NYC Motor Vehicle Collisions) to a polygon (i.e. a shapefile of ...
2
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1answer
5k views

Intersection of a raster and polygon in ArcGIS 10.3

I have two data sets one raster and one polygon. I am interested to see learning the area where the two overlap. I was thinking that I could use the intersect function, but since one of the layers are ...
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0answers
36 views

How much Vector Grid is intersected by another polygon layer using ArcGIS for Desktop?

I have a grid 5X5 sqkm and another vector layer with 2 different land cover type (let's say "forest"/"no forest"). I wish all the squares composing the grid to get a value ranging from 0 to 1 ...
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0answers
616 views

Python QGIS reliable intersection/overlap check between points and lines

In my script I need to check, whether a point I created stored in a memory layer lies on a polyline, which is in another memory layer. I am certain, that the point does overlap/intersect the line, ...
2
votes
2answers
2k views

Intersect with Raster data

I have ArcGIS 10.2.2 I have raster data over a whole state but am looking at just analyzing a specific county. I downloaded county polygons to overlay over the raster data to determine the area I ...
2
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1answer
3k views

Difference between Crosses & Intersects - Shapely (Python)

I have two questions : I have some lines (eg: road network). I want to find coordinates of each junction. Should i use crosses or intersects function from python's Shapely module? They are giving ...
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1answer
275 views

PostGIS - st_intersects using polygons that cross antimeridan/equator

New to using PostGIS and have two situations that I'm working with. In the one case, I have a polygon that crossed the antemeridian and was detecting whether a two separate points located within that ...
1
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2answers
382 views

Intersecting three polygon layers in ArcGIS?

I have three data sets of San Francisco, TerraSAR-X, ALOS-PALSAR, Radarsat2. I have extracted KML files using Envi Sarscape. In order to find the intersection of these areas, I have converted ...
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1answer
340 views

Intersect tool of ArcGis gives multiple intersecting points

I am using .net in arcGis 10.0 to develop tools.I have two polyline feature classes. I want to get intersected point of this 2 feature classes. for this purpose, I have used INTERSECT tool of arcmap. ...
3
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1answer
553 views

Checking if two WGS84 lines intersect in JavaScript

I am trying to work out given two GeoJSON lines (WGS84), if they intersect (i.e. cross one another). Let me give some pseudocode to illustrate: // Providing Line 1 = lon1, lat1 and Line 2 = lon2, ...
2
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2answers
116 views

Merging attributes from point with containing polygon?

I need to develop a process for merging the attributes of each point in a SDE feature class with a polygon in a SDE feature class that contains the point to create a third feature class. The third ...
0
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1answer
571 views

Computing geometric intersection (line-on-polygon overlay) using ArcPy?

I want to take geometric intersection of line and polygon shapefile. ArcPy has a tool: arcpy.Identity_analysis but it is available with "ArcGIS for Desktop Advanced" and I have "ArcGIS for Desktop ...
0
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1answer
129 views

Batch updating point attributes based on values of underlying polygon using ArcGIS Desktop?

I have a points shapefile with a blank field. I want to populate this field with an attribute obtained from another underlying (polygon) shapefile. I can do this for a single record easily using ...