Questions tagged [intersect]

Use for questions about the ArcGIS Intersect tool

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Attributes for points created by Intersect tool

Scenario: I am using ArcMap 10.3.1 to find the locations where an animal crosses a road from GPS data and the associated attributes such as X and Y (which I can calculate) and the date and time of ...
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2 votes
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71 views

How to get a list of lines, with a list of polygons that they intersect? [closed]

I am a new user in a PostGIS environment and don't even know where to start. I have two tables, one storing lines and the other storing polygons. I to create a query that can be used to get a separate ...
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Using Intersect with arcpy.GetParameterAsText() and ArcMap

I'm trying to use the intersect tool, with one of my inputs being from a get parameter as text. As I don't have an advanced licence I have to iterate through the list to run the intersect on each item ...
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Using intersect analysis within if loop as part of function

I'm currently trying to create a function for calculating an intersect of one of two shapefiles with another shapefile. I am later looping through the list of files and, depending on which one the ...
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Bring Line ID which intersect with a point buffer in arcpy

In ArcPy, I want to take each point buffer one by one and check which two lines intersect with it and bring the ObjectID in order to use those two lines ID in this script. import arcpy arcpy.env....
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How to prevent self-intersection when using Intersect tool in ArcGIS?

When using the Intersect tool in ArcGIS (Desktop 10.8): I have two inputs, a polyline FC and a polygon FC. I want to get the intersection of each polyline feature with the polygon features, so the ...
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51 views

How identify if polygons from layer A are in same polygon from layer B in Python

I have two polygon layers, layer A and layer B. Layer B polygons are much bigger than layer A polygons. Now, some of the little polygons from layer A are located in the big polygons from layer B, and ...
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1 vote
1 answer
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Spatial Joins - Intersect then non-joined Nearest

Is there a tool to join by interest and then for those that are not joined, join by nearest - all in one calculation? If not, maybe this is a valid feature request, to combine these two tools together ...
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Predicting future coastlines based on TIN/Raster DEM and elevated polygon using ArcMap

I am trying to figure out how I can create projected future coastlines by intersecting an elevated polygon (representing future sea level) with the TIN/DEM of my study area. Does anybody know how I ...
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Intersection of 3d layers in PostGIS with SQL Queries

I am currently working on a project for Uni with PostGIS and SQL Queries. I am trying to calculate the intersection between two 3d layers. Based on online tutorials I came up with this query. SELECT ...
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1 vote
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60 views

QGIS join by location not working between two shape files

I am getting this weird error while using join attributes by location in QGIS, I have two layers - Source & Target. I am joining by target to source features using intersect option in join ...
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SQL: detect invalid points outside an overlapping feature

I am using the latest QGIS software. I am working on this script for the basic selection of invalid geometry points beyond the overlapping context, and how would I finish writing it in the WHERE ...
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2 answers
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Delete geometries based on intersection with another layer

Working on QGIS, I have two layers 1. buildings (polygons) 2. flood area (polygons) I want to get rid of the building located in flood plains. In other words, I need to find where those layers ...
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2 votes
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Checking if one point from sf object falls within a specific polygon from different sf object in R [closed]

I have one sf object in R that consists of millions of GPS points of different persons (each point includes ID for each user). I have another sf object that consists of polygons that correspond to 100-...
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Intersecting a polygon with a line

I'm having an issue intersecting a polygon with a line in QGIS. The split with lines option has worked for me so far but for some reason wont work for this polygon on the left. I need the polygon top ...
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Determining degree of intersection between two polygon feature layers limited by time of occurrence using ArcGIS Pro

I have two polygon feature classes. One relates the extent of silviculture treatments on USFS lands across the western United States: The other relates all recorded fire events across the same extent:...
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How to select or intersect FeatureCollection object with an Image object in GEE

I am working on some coordinates taken on the field (corresponding to the presence of a certain plant in a natural park), and on a code that created a mask, on GEE, initially coming from Sentinel. ...
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Using Intersect on data from a geopackage results in empty dataset

This question is somewhat related to a previous question of mine: Using Clip on data from a GPKG results in empty result set - WARNING 000117 I have a lot of datasets of which I'm only interested in ...
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ArcMap - Two lines clearly intersect but the intersect tool disagrees

ArcMap 10.4.0.5524 for Desktop. No internet connection. Two sets of lines (both in a file geodatabase). I want to get the points where they intersect. I use the intersect tool with both sets of lines ...
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1 vote
1 answer
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Quantifying number of overlapping shapefiles using ArcPy with ArcMap

I am using ArcMap 10.7. I have a multitude of shapefiles representing glacial lakes in different stages of their formation, each shapefile produced using a different climate model as basis. All ...
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1 answer
72 views

Joining all atrributes of one column in point-layer like number in multiple columns of a polygon-layer like number_1, number_2 etc. in QGIS

I got a point-layer Points where all points lying exactly on the vertexes of the polygons of a polygon-layer Polygons. How do I join all numbers of the point-layer to the polygon-layer? All algorithms ...
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Improving output of Intersect tool of two street network datasets using ArcGIS Pro

I ran the Intersect tool on two street network feature classes to identify streets that are shared between them, with the output below. As you can see, the lines are exactly what I'm looking for. ...
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Unable to intersect polygons in R even though CRS matches?

I am trying to use areal interpolation to distribute the values from a source polygons layer into smaller, differently-shaped polygons from a target layer, and have been unable to do so. I have been ...
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3 votes
1 answer
94 views

Area of intercepted geometry

I have a polygon layer and a point layer (which was created by obtaining the centroid of each polygon in the polygon layer). I have tried to use the aggregate expression to automatically fill a field ...
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Filtering dataset for intersecting polygons and combining them using R

I am working with large datasets of polygons (multiple thousands), where some might intersect (see example 1). I want to identify which polygons intersect and separate them from the ones that don't ...
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Finding average value from polygon areas in fishnet cell based on lat/long of points using ArcGIS Pro

I have created a fishnet of 0.5x0.5degrees and wanted to know the average lat/long in each cell in ArcGIS Pro. How could I accomplish that?
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Using Spatial Join for single point joins in ArcGIS Pro

I am trying to join population and job data to service area polygons I created, summing the population and job values to the service area polgyons. I had already previously joined the population and ...
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1 answer
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Intersecting two rasters in ArcMap

I have two raster layers with different resolutions that I want to join. One has higher resolution (transparent yellow) and the other raster has lower resolution but bigger extent (whole earth) and ...
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5 votes
1 answer
158 views

Disjoint is very slow in Virtual Layer but fast on symbology

In QGIS, take a polygon grid (named 'grid') and a multipolygon layer (named 'surfaces'). For each feature in surfaces, I want to union all features of the grid that are disjoint (not intersected) with....
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Identifying which polygons lie within grid of polygons using ArcMap [closed]

I work in ArcMap 10.8.1. I have a polygon layer of municipalities and a polygon layer of 1x1 km square zones of air polluted areas (it's not a raster). I need to find which of the municipalities are &...
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Intersection of points for overlapping polygons

I have the following intersection task: I want to do an intersection of points and polygons. I want to add the variables of the polygons to the intersected points Some of the points fall in more than ...
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4 votes
1 answer
72 views

Label neighbouring features in QGIS

In QGIS I'm trying to label the neighbouring features of a certain polygon but not getting much success. All the features are inside the same layer named MG_Municipios_2020. I'm using the Rule-Based ...
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2 votes
1 answer
211 views

OpenLayers : intersect between polygon and circle not accurate

When I look for intersect between circle and polygon. He finds intersect between these two, who are not visually intersected. Everything should have the same projection ('EPSG:3857'). But I don't know ...
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Calculate raster landcover area in multiple overlapping buffers

I have 900 1km buffers (polygons) in one layer and a raster layer for forest area (reclassified into forest 1, non forest 0). I have tried: Tabulate area - but realised this does not work for ...
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4 votes
3 answers
227 views

Extracting polygons from layer crossed by lines layer

I'm looking for a way to only select entities crossed by a lines layer from a polygons layer. I've unsuccessfully tried the Intersect function with lines layer overlay. I'm mentioning that I have used ...
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29 views

Intersection of all layers of different feature classes using ArcMap

I have 20 different layers where a few of the layers are lines ( rivers) some are points and a few are polygons. I need to find all the single polygons where all 20 layers intersect as describe: ...
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30 views

How to performing selection by expression using QGIS

I am using QGIS 3.8. I have a grid (hexagon) and a set of points. I am trying to select the hexagons containing at least 1 point. So far nothing complicated. Except that sometimes my points overlap 2 ...
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1 answer
153 views

Selecting not overlapping polygons using QGIS

I have a shapefile with 1000 points and a layer with 30 000 polygons. Not all of the points overlap with the polygons. For all of these points, which are not overlapping with a polygons, I need to ...
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360 views

Creating python function to merge line segments if they are connected using ArcPy

I have a polyline shapefile consisting of several line segment features. I want to do a merge operation if the line segment features endpoints are connected, and if the features are disconnected do ...
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3 votes
1 answer
198 views

Calculating final polygon after subtracting all intersecting polygons using shapely [closed]

I have a list of centroids that I buffer to 5000 meters radius. I need to take each resulting circle and run it against the remaining centroids(also buffered to 5000 m) and find the final shape after ...
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4 votes
2 answers
75 views

Selecting only the first row of polygons around polygons

I am currently working on my thesis and after trying for a few days I decided to ask this questions since I guess I'm stuck. I'm working on ArcGIS PRO 2.7.0 with datasets obtained via Esri (online) ...
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1 vote
1 answer
260 views

Using TIFF file in Intersect tool of ArcMap

I am attempting to do some geoprocessing with a CSV file and a TIFF file (trying to use the Intersect tool), but am experiencing some trouble with it. I can't seem to be able to input the TIFF file as ...
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2 votes
1 answer
55 views

ArcPy Intersect without self-intersection

I'm doing an intersection between buffers around street centerlines and census block group geoms. The extent and density of features is fairly large so I'm running into memory limitations consistent ...
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0 votes
1 answer
210 views

Adding column to attribute table indicating polygon each data point is in using ArcGIS Pro

I am working on a project linking ideas in Geology and Ecology. I currently have a map showing the geology of an area (polygon layer), with a points layer on top indicating the locations of data ...
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2 votes
1 answer
101 views

Overlap area of features from same feature class

Is there a way to calculate the area of overlap between features (polygons) from the same feature class. See figure below as illustration for example. There are 3 features with an ID and area and I ...
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3 votes
1 answer
1k views

What is the algorithm that Shapely used to check if two polygons intersect?

What is the algorithm that Shapely used to check if two polygons intersect? from shapely.geometry import Polygon p1 = Polygon([(0,0), (3,0), (3,1), (1,1), (1,2), (3,2), (3,3), (0,3)]) p2 = Polygon([(4,...
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1 vote
1 answer
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PostGIS where clause not working as expected with multipart geometry

I am running an intersect from a subset of one table on itself (this is part of a larger parameterized query but the issue in question arose out of this particular situation) using a CTE (zones in the ...
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1 vote
1 answer
26 views

Making the categories layer style which shows features overlapping another layer in a different color

I have tried with this new QGIS function from expression engine but it is not working. Here is the query I have tried: overlay_touches('Master_3307To3339',filter:= within(geometry(@parent),@map_extent)...
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0 votes
1 answer
3k views

Clip function in the sf package in R

I try to clip shape "a" with shape "b". The result should be a polygon with the attributes and borders of "a" but cliped on the extent of "b". Basically a ...
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1 vote
1 answer
40 views

Layer from server as input to ArcGIS Pro Intersect

I am working in ArcGIS Pro 2.6.1 and I have managed to pull in data from a server found here: https://spartagis.ncem.org/arcgis/rest/services. The layer in particular is the NC_AllBuildings layer. I ...
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