Questions tagged [intersect]
Use for questions about the ArcGIS Intersect tool
252 questions
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PyQgis Intersect line with polygons. Result is not Correct (some of polygons result not intersec the line)
I have a track (Line) and I want to know wich countrys/cities (Polygon) intersect this track.
I try in two ways:
a) With PyQgis - I use QgsSpatialIndex().intersects(track.geometry().boundingBox())
...
- 790
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76
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ArcMap Intersect Tool is missing just one intersect point of two polyline shapefiles?
I'm trying to find the intersect of 2 polyline shapefiles. One shapefile is a long line (of multiparts), the other shapefile is 11 straight lines that "fan out" radially. The ends of the first ...
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78
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Adding raster value with specific equation using ArcMap
I am trying to develop a raster layer with the interference of streetlight in this example:
As you can see, there are multiple buffer rings around a point layer. I actually want to transform this ...
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335
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Using ArcPy with Intersect and loop
I am new to scripting.
I have around 4500 small shapefiles to be intersected with one big shapefile. The primary key is to make 4500 small intersected shapefiles.
How to do it correctly by using ...
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374
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Intersect_analysis in ArcPy "The table was not found."
Is there a bug in ArcPy? I have two features I want to intersect in a feature data set using ArcPy (this is a small part of a bigger program). Let me preface this by saying that when I do this in ...
- 152
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196
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Adding attributes to intersected polygons from corresponding columns R
In short, I have a set of 10 polygons in Pol_large, that I want to split to individual polygons by intersecting (intersecting areas become new polygons, and old ones get cropped). In result, I am ...
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436
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Intersect tool in QGIS produces two copies of intersected line
I'm using the "Intersect" tool in QGIS 3.10.3 on two line layers 'A' and 'B' to create the intersecting layer 'C'. I can then use the "Difference" tool to subtract 'A'-'C' and to ...
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434
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How can I get the points where two line shapefiles intersect?
I have two shapefiles that I want to compare and get the points where they cross. I would like to avoid opening QGIS or GRASS since I am trying to automate a process so I have been looking at OGR, ...
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2
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79
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Seeking QGIS tool for auto correcting address ranges at new intersections
I do public safety GIS, which is primarily centerline work. A tool that I have found indispensable when creating intersections where I don't have exact address point data is the Intersect Line tool ...
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Line and polygon intersection in GeoPandas/Python
I am trying to intersect two GeoPandas data frames, the first one is the street data (streets) and the second one is a buffer (polygon) around a point (buffer).
I want to find the intersection of ...
- 136
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408
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Clip/Make difference between line and polygon layers [QGIS]
I need to clip one layer out of another, both are vector layers (one of them i got from vectorizing a raster layer). When i try to clip out "LowNitro" out of "FlandersAgriculture"
Intersect doensn't ...
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2
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304
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Ignoring overlapping polygons within same feature class when using Intersect tool of ArcGIS Desktop
I am attempting to intersect two feature classes, one of which has many overlapping polygons. I don't want to calculate the intersection of overlapping features within the same FC, but instead only ...
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120
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Finding matching point of two layers
I have two layers in ArcGIS:
Highway layer (9000 data points (or values))
Safe zone (4 types of values i.e. safe zone, medium zone, bad zone, and worst zone).
Now I want to do analysis to see how ...
- 249
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127
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Query polygons using ogrinfo but not generate a new layer
I want to list the polygons in my layer A that intersects other polygon B, using ogr.
The desired result is similar to "Select by location" tool in QGIS or ArcGIS Desktop, where I expect an index of ...
- 283
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2k
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Find points within polygon with PostGIS really slow
From some millions of points I am trying to select those points that are within a polygon and save them into a new table. Both datasets with spatial index and both on projected coordinates.
The query ...
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Overlap Analysis in QGIS
With QGIS 3.8 a new Tool has been introduced: Overlap Analysis. It says that it "calculates the area and percentage cover by which features from an input layer are overlapped by features from a ...
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Specifying output location of iterated Intersect tool results using ArcPy?
I have created a code that iterates through a geodatabase, intersecting each feature with a road network. I am not sure how to make it so the intersected features are output into a new geodatabase. ...
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213
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Adding vertex where point intersect in ArcGIS Desktop?
How do I add a vertex to a line or polygon where a point feature intersects it?
I am using ArcGIS Desktop.
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Using Update Cursor within Search Cursor with ArcGIS Pro?
I am new to using ArcPy/Python and I'm running into problems with a script I'm trying to write.
I'm using IDLE Python 3.6.8
ArcGIS Pro 2.4.0
Here is what I'm trying to do - I have 2 feature classes: ...
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51
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How to clip polygon such that only regions in 'line of sight' from a point remain
I am using ArcGIS.
My point represents a monitoring station and is located within a polygon representing a river catchment.
I have created a buffer of 300m representing the detection range of the ...
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496
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Selecting points within fishnet grid cell with criteria of at least 3 unique values using ArcGIS Desktop?
My goal is to create a raster from points with values based on at least 3 unique IDs within a cell. Cells that had fewer than 3 points with unique IDs will have value NA. See below for clarification. ...
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15
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Subtracting features from one layer using another layer in ArcGIS Desktop? [duplicate]
I have 2 layers of land parcels for a particular area (shown on top of each other like so):
The darker parcel lines and road polygons are from an earlier parcel map. The land has been developed and ...
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2
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2k
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Finding overlay/intersect shape percentages using QGIS? [duplicate]
I am working on a project in which it's necessary for me to overlay 2 layers (a map of precincts and a map of census tracts).
I need to be able to determine the %area of each census tract covered by ...
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206
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Clip/Intersect tool stopped working
I am using ArcMap 10.5.1
I have been using the Clip tool to cut out the amount of a given habitat type found within individual buffers around individual samples. After successfully executing this ...
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1
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2k
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Why does spatial join on geodataframes return empty result?
I have two geodataframes that I want to perform a spatial join on; one is points, one is polygons. They are both dtype: int64. They both have .crs = {'init': 'epsg:4326'}. I have verified both of them ...
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226
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Joining attributes by location/intersect works for all but one polygon in QGIS?
I used the Join attributes by location and Intersect tools in QGIS 3.4 for my points layer to add a column with name of the intersected area into the attribute table of points. It works perfectly for ...
- 31
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3
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2k
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Intersect multiple layers at once QGIS
I'm very new to QGIS and am just learning the intersect function. I have about 10 polygons that overlap (not perfectly) and one layer of about say 15 points. I want to know with which of the polygons ...
- 41
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113
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ArcGIS Pro Unable to Pairwise Intersect Point with Polygon?
I am trying to create a point from XY coordinates then use Pairwise Intersect to determine the corresponding parcel. The intersect is not returning any values. Any thoughts on the error in this code?
...
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85
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In ArcGIS 10.6, how do I build a model to intersect iteratively?
This is my first time building a model from scratch, so let me know if I've omitted anything in describing this question.
I have a geodatabase that contains shapefiles (polygons) of watersheds. I ...
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1
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263
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Identifying intersections in ArcPy?
I have two shapefiles: one containing a single polyline feature, and the other containing a number of polygons. I'm trying to use ArcPy to identify which polygons are crossed by the line, and then ...
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85
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Selecting records from shape that do not match another table's values using ArcMap
I am using ArcMap 10.4.
I have a shapefile that results from an Intersect between a polygon shp and a point shp. So my resulting shp is a point one! One of the field in my intersect resulting shp is &...
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138
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Determining if raster can be clipped with polygon using ArcObjects?
Using ArcGIS 10.4.1 ArcObjects with geoprocessing. I have an input feature class with 100s of polygons and also one raster. I iterate through each polygon and clip the raster and then do additional ...
- 437
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2
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990
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Calculating the total area from two intersected polylines using ArcGIS or Python
If two polylines intersect with each other and there are more than 2 intersect points, there is more than 1 closed area will be created.
How can I get these areas as polygons in ArcGIS Desktop or ...
- 310
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606
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Java GeoTools API: getInteriorPoint does not work on an intersection between Polygon and MultiLineString
I'm working on a Java project using GeoTools API that want to get the interior point getInteriorPoint(), from the geometry coming from an intersection between a Polygon and a MultiLineString. Please ...
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606
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Is Geometry object intersect faster than Intersect_analysis in ArcPy?
I have a script attempting to identify Many-to-Many matches between two different parcel layers. It is an iterative process, during which I dissolve the selected polygons in layers A and B, intersect ...
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Finding polygons that overlap other polygons within same layer using ArcPy? [duplicate]
I have a shapefile containing polygons. I would like to select all polygons within the layer that overlap with other polygons within the same layer.
The closest I have gotten is the Intersect tool ...
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3
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1k
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QGIS: Intersect rasterdata with vectorline
I am new to QGIS.
My aim is to be able to get information of the height at any point on my vector line. My raster is a map with height information in the format geotiff. The vector layer is in the ...
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3
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55
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Specific intersections [closed]
I have a polygon layer that looks like this i.e. they overlap.
When I run an intersection between the layers, I get more polylines i.e. for the circle on the top, the three lines get split because of ...
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99
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How to output file with all overlaps between two Shapefiles - Neighborhood/Zip Codes [closed]
I have a pretty specific problem I would like help with.
I have two shapefiles:
neighborhoods from https://www.zillow.com/howto/api/neighborhood-boundaries.htm
zip codes from the census bureau: ...
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362
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Performing Intersect of polygon with raster, retaining ID of polygons? [closed]
I have a raster data set of land cover and a set of residential addresses (points).
I want to find out what percentage of each land cover type is within 1km of each address (i.e. in a 1km buffer ...
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2
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2k
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Combining two spatial tables in PostGIS
I have two PostGIS tables with geometries. One with number attributes and one with letter attributes. Each table has two features (rows).
I would like to apply a operation on both stables so that I ...
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730
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Using postgis to flatten all polygons in table
I have a table with many polygons. The polygons all have a name and a value.
I want to flatten these polygons so that each polygon border remains as border to the resulting polygons. Instead of ...
- 3,201
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Intersecting data in ArcGIS ModelBuilder?
I have 432 suburbs polygons and an open space dataset comprising polygons
I need to extract for each individual suburb the open space polygons inside and those which straddle the suburb boundary (Not ...
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Speed up intersection, union in PostGIS?
I have three tables: water, wetlands and parcels. I want to update parcel table with area that is covered by water or wetland (they can overlap).
So I want to
Merge water with wetland
Dissolve and ...
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2
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150
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Move files from Table Of Contents to a geodatabase in ArcPy?
I have a program that selects certain files and imports them to the Table Of Contents in ArcMap.
I would like to do some self intersect operations to all and put them both the original files and the ...
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2k
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Intersecting raster with polygon grid in ArcGIS Desktop?
I'm trying to generate the fractional coverage of land-cover within polygon grid cells.
My land-cover is a 30m raster dataset (10008x8939 cells) and my grid is a fishnet shapefile (approximately 1km ...
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calculating share of layer refer to another layer
I have two vector layers (1) with 107 subdistricts (2) soil map with classification of the soil value. I like to calculate the share of the area of the soil map with values classified as "very_high" ...
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276
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Determining validity of odd polygon using ArcObjects?
Using ArcGIS 10.4.1 a user in our department created a polygon and saved it to a feature class as shown below. The area covered is correct as at times it could overlap itself. I have calculated the ...
- 437
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98
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Using ModelBuilder to intersect point data against multiple polygons?
I'm a novice GIS user and looking to create a model in ModelBuilder that can intersect point data which is a survey data made up of 1000's of individual points in dbf format.
This data will change ...
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286
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Difficulty using variables as input parameters for arcpy.Intersect_analysis
I have 2 variables created from a previous geoprocesses:
fc = arcpy.JSONToFeatures_conversion("cslf.json", os.path.join("cslf.gdb", "cslf"))
selectFeatures = arcpy.CopyFeatures_management(select, "C:\...
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