Questions tagged [intersect]
Use for questions about the ArcGIS Intersect tool
182
questions
-1
votes
0answers
47 views
Creating python function to merge line segments if they are connected
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 ...
-1
votes
0answers
11 views
make a multiple intersect rule in one attribute rule
For my water utilities, I want to run a intersect rule in a line layer to update the upstream structure based on a intersect of multiple points. That way if the start point intersects a manhole or a ...
2
votes
1answer
44 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 ...
4
votes
1answer
52 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) ...
1
vote
1answer
26 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 ...
2
votes
1answer
41 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 ...
0
votes
1answer
18 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 ...
1
vote
1answer
29 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 ...
2
votes
1answer
110 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,...
1
vote
1answer
61 views
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 ...
0
votes
0answers
9 views
Spatial Join 3D point datasets: Ecological Marine Units (EMUs)
I have a global set of sampling points (N = 500+) that I would like to attribute with the Ecological Marine Unit (EMU) classifications near which they fall. The EMU dataset and my sampling dataset are ...
1
vote
1answer
23 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)...
0
votes
0answers
14 views
Tabulate Intersect with Overlapping Polygons
I am trying to create a table that summarizes soil information for the given buffer areas of 125m and 500m radii. Both the soil data and buffer data are in vector form. Within each buffer, there can ...
0
votes
1answer
57 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 ...
1
vote
1answer
19 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 ...
5
votes
2answers
90 views
Intersecting area between two polygons in the same shapefile in QGIS
I have a shapefile with two polygons in it. I would like to be able to generate the intersecting area between the two polygons.
Please note, I have tried using the intersect tool, however this does ...
1
vote
1answer
28 views
Intersect function is generating different outputs in ArcMap and ArcPy
I am currently running the following code in ArcPy:
in_dir_temp = "D:\\X\\"
x1= in_dir_temp + "x1.shp"
x2= in_dir_temp + "x2.shp"
y1= in_dir_temp + "y1.shp"
...
2
votes
2answers
146 views
Checking intersection of two shapefiles using ArcPy
I am new to Python programming.
How do I check the intersection of two shapefiles using ArcPy?
If the shapefiles intersect, it should return True else False.
Below is the code that I have written :
...
1
vote
2answers
41 views
Check if coordinates intersect rotated rectangle
In a non-GIS system, I have a Python script that checks to see if coordinates are valid:
def is_latlong_valid(laty, longx):
#Verify if the numbers are legitimate UTM coordinates
return (...
1
vote
0answers
23 views
List points from other layer where intersects with line
I want to make an easy script for QGIS calc. I have 2 layers (points, and line).
Painting the line crosing by points. At end I want to automaticly fill fild (text attribute) with list of points.
I was ...
1
vote
0answers
18 views
Use ArcGIS to classify intersection types
I am using ArcMap 10.4
I have a shapefile of a road network. Each road has a functional class value in the 'FC' field. I'm trying to determine how often roads of each functional class intersects ...
0
votes
1answer
19 views
Why when I do an intersect analysis on a point feature class to a line feature class I only get 'one' point result?
ArcGIS Pro. I've merged my point feature classes of species and have gone to run an Intersect Analysis on these with a line (river) feature class. However, I only receive one point in the output and I ...
0
votes
0answers
26 views
Intersecting multiple feature classes with just one feature class?
I have multiple feature classes (fc) and would like to intersect them with one other fc, is this possible without merging/joining the multiple fc's?
Using ArcGIS Pro I've attempted to intersect ...
1
vote
0answers
12 views
Counting number of intersections for N linestrings
I have a database with D entries of polygons representing buildings. Each entry/row has the following information: id, min_height, max_height, geom (min_height is for buildings that have some kind of ...
0
votes
0answers
14 views
Dynamic (auto-refreshing) import of a polygon attribute to a point lying within this polygon
I want to achieve something similar to what was discussed here. Except I would like this attribute to be automatically updated if I change the attribute of a polygon (its name specifically) or move ...
0
votes
0answers
13 views
Extracting number and attributes of points in a GRID in ArcGIS
I will be thankful if someone can help in extracting the number of points with attributes using the grids. For example I want to know number of species points in a grid with attributes. I have ArcGIS ...
2
votes
1answer
46 views
Intersect overlapping entities and their attributes
I have a shapefile containing 6 classes of polygons on QGis 3.14. Some of these polygons overlap each others, but they're not geometry errors or duplicates, just polygons with different attributes. ...
0
votes
1answer
76 views
How you get values within intersect layers and autofill attributes to another layer form when creating a new object
When im creating a point that intersect on an polygon, how you can get values from attribute polygon and autofill the attribute in the point layer.
There will be some code?
I´m using qgis 3.12
...
1
vote
0answers
23 views
QGIS: Intersect two polygons, one line layer as Output
I have two polygons that intersect, now I want to calculate the length of the outline of the new polygon, but only the outline it shares with one of the input polygons. Is there a way to enter two ...
0
votes
1answer
57 views
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())
...
0
votes
0answers
9 views
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 ...
4
votes
0answers
30 views
How to add raster value with specific equation?
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 ...
1
vote
1answer
42 views
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 ...
0
votes
0answers
73 views
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 ...
1
vote
0answers
38 views
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 ...
1
vote
1answer
95 views
QGIS Intersect tool 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 subtract B-C, resulting in three ...
1
vote
1answer
49 views
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, ...
2
votes
2answers
48 views
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 ...
1
vote
1answer
1k views
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 ...
1
vote
0answers
83 views
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 ...
0
votes
2answers
64 views
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 ...
0
votes
0answers
35 views
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 ...
0
votes
1answer
34 views
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 ...
1
vote
2answers
361 views
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 ...
2
votes
1answer
1k views
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 ...
0
votes
1answer
37 views
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. ...
-1
votes
1answer
45 views
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.
1
vote
2answers
322 views
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: ...
1
vote
0answers
44 views
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 ...
2
votes
1answer
169 views
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. ...
