Questions tagged [proximity]

Use for questions about vector features and their proximity or nearness to other features.

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QGIS How to calculate closest point referenced to centroid?

I have a QGIS project in which I work with a polygon layer ('POLIGONS_TEST') and a point layer ('PUNTS_TEST'). I use the following Geometry Generator expression on the 'POLIGONS_TEST' layer to draw a ...
• 2,419
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Linking all possible polygons to point within a distance

I am using Python. I have a shapefile with polygons and a CSV with points. My goal is to assign to the points all the possible polygons within a distance of 10 kilometers. I am able to assign the ...
• 618
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Near Analysis with GEODESIC method, the feature classes aren't being recognized

I have postal codes and bus stop location, I need to find out the nearest bus stops from postal code location. I am applying GEODESIC distance method in near analysis. import arcpy as ap # Set ...
268 views

Creating list of adjacent polygons in QGIS

The answer to Using join in Mapviewer describes an effective way to count the number of adjacent polygons. However, I need to create a list of the adjacent polys. I envision a process that generates ...
• 8,160
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Calculating/determining point on elevation surface closest to point underground using ArcGIS Pro

I wish to find the spot on the earth's surface that is closest to my underground point. Which tools do I use to calculate this? I am modeling in a Gobal Scene various layers, including one layer which ...
• 1
33 views

Determining if feature occurs between single point and polyline using ArcGIS Pro

I am using ArcGIS Pro. I'm looking to perform an analysis that outputs whether or not something lies between two points. This specific example would be: does a stream occur between a point of interest ...
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20 views

Distance from polygon to address using ArcGIS Pro

I have a layer that is polygons. One of the data fields is a street address. How can I determine which polygons are a street address that is more than X miles away from the polygon?
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1 vote
19 views

How to adjust gdaltransform ground control point weighting control?

Let's take a 6 x 6 mile US PLSS township, and house numbers 800 to a mile. Using gdaltransform, given the coordinates of each section corner as our ground control points (-gcp 4800 4800 lon lat for ...
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Proximity Map from Line Shapefile (Line to Raster)

I have this cycling route and I need a proximity map that shows the proximity to this route: I have the route as line shape, and I turned it into raster (using vector to raster). Following this exact ...
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gdal_proximity - setting processing extent using -te parameter in QGIS not working

the default processing extent of many tools in QGIS is the input layer's extent. GDAL Proximity (Raster Distance) is no different. According to the documentation (https://gdal.org/programs/...
1 vote
78 views

Finding shortest distance from one point to each polygon and the distance from that point of the polygon to any of the points in the polygon in QGIS

I'm trying to find the shortest distance from a point (point A uploaded as a CSV) to a polygon uploaded as a shapefile (polygon 1) and then the distance from that point of the polygon to any of the ...
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140 views

How to transpose points on a line

I need to transpose points on a line, how do I do that? Which tools should I use? More precisely, my problem is this. I have points taken with the gps (then converted into shapefiles) that are on a ...
31 views

Proximity distance calculation error

I am trying to calculate the proximity distance for my road layer. I have already converted the vector layer in raster, with the units in meters. However, when I try to run the proximity distance tool,...
1 vote
120 views

Get nearest points by sindex at large data

I have cities and roads of a large region. I want to get distance of the cities by roads that connect them. However, coordinates of cities are not exactly on the roads so I cannot implement ...
• 11
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Drawing 10 nearest lines from each point connecting to the centroid of the 5 points nearest to each point with QGIS expression

Starting from a layer with point geometry, my goal is to do two calculations in one Geometry Generator expression. First, for each point, I would like to calculate the centroid for the 5 points ...
• 2,419
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Merging thick boundaries with individual districts

I have this shapefile of Akron's city council districts in 2010. For some reason the boundary lines are very large. What would be the simplest way of combining the with the nearest district? If the ...
116 views

Extracting two closest points with matching ID and create line between both points in QGIS

In QGIS, a have point vector Layer_A with a unique ID field and point vector Layer_B with multiple points for each Layer_A ID. For each point on Layer_A I want I need to create a line that connects ...
• 1,504
1 vote
142 views

Moving (snap) lines to nearest features in QGIS

I have two sets of lines: Layer A (a planned network) and Layer B (how the network was realized). The course of the lines on those two layers is similar, but not the same and they do not have the same ...
• 11
274 views

I have a large dataset (about 50,000,000 rows) of GPS x,y points related to GPS equipped taxis with timestamps and speeds. I also have a shp. of the OSM links and I want to find the nearest link to ...
75 views

Selecting points near lines in QGIS

In QGIS 3.22.16 I try to select and delete some roads (lines) that have a False value in the attribute table. Along with that, I need to delete all the gullies (points)along these road. I don't have ...
• 321
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arcpy.analysis.Near within a for loop

I want to calculate Distance between Points from two different polygon tables. I'm using this code but I get this error code. Any idea? import arcpy ​ search_radius = "5000 Meters" ​ ...
1 vote
139 views

Making Nearest neighbour join with attribute condition in QGIS

I have two line layers in QGIS: Input Layer A: Street Segments Layer B: Traffic Data and would like to perform the nearest neighbour join with a condition (where the same street name is equal- one-...
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Data jumbled when setting Zimbabwe CRS

I have got point data in Zimbabwe and am having a lot of trouble getting the projection right. I have tried saving the QGIS project and layers to to WGS 84/UTM zone 36 and this now displays correctly ...
• 11
110 views

QGIS value relation dropdown filter by overlay_nearest

I have in QGIS 3.28.8 two point layers: source_p and target_p I want in source_p layer to create a dropdown to "TargetFID" field with Value Relation to target_p layer with only 3 nearest ...
• 464
418 views

Creating “distance to” raster using QGIS

I imagine there’s a proper term for what I’m trying to do but, if so, I do not know it. I have a map of populated areas, as polygons. I can rasterise that, but what interests me isn’t the effect of ...
125 views

How to obtain the nearest line between two point layers with the constraint of a line distance layer

From three layers: 'POINTS': Points of house facades 'CONTROL': Waste collection points 'STREETS': Street axes When you apply an standard expression like the following to find and draw the nearest ...
• 2,419
1 vote
473 views

Calculating distance between point and polygon in network in QGIS [closed]

I have a 100x100m hexagon grid (polygons) and a point layer with football fields. I would like to calculate the "walking" distance (aka distance using the actual network, not straight line ...
• 301
58 views

Finding closest point on line from point using ArcMap

I am using ArcMap 10.8. How can I find the point on a line that is closest to a given point, or alternatively, the closest vertex point of the line if it is not perpendicular? Refer to the following ...
149 views

Identifying direct neighbours connected by network in QGIS

I have a point layer of settlements and a LineString layer of a road network. The settlements have been snapped to the network so they are directly connected by it. Settlements are not always at the ...
• 141
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Finding maximum possible distance of point to polygon boundary using QGIS Expression

Points layer is structured as below Polygons layer also has code as a field For each point, I want to get maximum possible distance to the edge of the polygons listed with code in the overlap column. ...
• 101
193 views

Connecting points to the two closest highest values grouped by category

In a points layer with the fields "POP" (corresponding to the population value) and "CATEG" (corresponding to municipality id), my goal is to connect the points of each ...
• 2,419
265 views

Finding nearest line feature from linear layer in QGIS

I have two linear layers like you see below: I would like to select just the nearest black lines to the red ones, which represent the other layer. I found similar solutions, but they refer to the ...
• 4,029
1 vote
214 views

Distance between individual points within a feature collection and a separate polygon - GEE

I have a feature collection containing 100 points and a raster of ice present in Greenland. My goal is to calculate the distance between each individual point and the patch of ice closest to that ...
1 vote
219 views

Trying to find nearest point on a coastline (in Python), but projection is not working as I expect

I am trying to find the nearest point on a coastline, to a station. However, I cannot get the correct answer. Here is a minimal example with an artificial coast line: the west coast (w_coast) is ...
• 113
1 vote
56 views

Measuring distance from coast along stream network

I have a stream network I am using to make a suitability model for a species. One of the factors I want to consider is distance from a given point to the coast, so I'm hoping to find a way to create a ...
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258 views

How to create variable buffers with nearest mean distance radius value

Given a point geometries collection, I would like to use an expression which: Find the 4 points nearest to each other Create the buffer for each group of 4 points with the radius distance value ...
• 1,122
225 views

(Extended) Proximity Analysis on QGIS

I have a road shapefile that I've rasterized. My study area goes beyond where the roads are. I've tried using Proximity tool with the rasterized roads to create a "euclidean distance" layer (...
• 61
144 views

Calculating distance between two closest points on graph in QGIS

I have a graph layer and a point layer. The points are snapped to the graph. I want to get the distance between the closest points on the graph
62 views

Calculate distances from points to all adjacent polygons in ArcGIS

I have the zip code centroids and state polygons. I want to calculate the distances from each zip code centroid to all the nearby states using ArcGIS. I have tried to use Generate Near table tool, but ...
• 343
23 views

Determining locations that contain multiple raster attribute types within a set distance

In ArcGIS Pro 3.0.0: I have a raster dataset of land cover type (LANDFIRE.gov), where each cell is assigned one of many possible land cover types (strings) in the EVT_NAME attribute column. I'd like ...
1 vote
56 views

How to use Near tool then join by FID to calculate exposure index [closed]

I am working on a project and the instruction I am given is: For each school, calculate an index of its exposure to toxic emissions. For all toxic sites within 1 mile of each school, divide the site’...
• 17
195 views

Populating attribute table with the ID of the nearest point in QGIS

I have two point layers, let's say one is 'endpoints' and another layer is 'nodes'. The "endpoints" layer attribute table has a field called "nearest_node", I want to populate it ...
• 73
261 views

Enabling time field in ModelBuilder of ArcGIS Pro

Does anyone know how to enable a time field in the ModelBuilder of ArcGIS Pro? I am attempting to create a model that takes a newly created feature class and runs "Group By Proximity", which ...
• 33
2k views

Finding all latitude and longitudes within X km range from input location using Python

I've close to 4000 location data(latitude and longitude). The task is to find all location points(from the above location data) within the X km range from the input location. Example input_latitude = ...
119 views

PSQL can I speed up a distance and string matching calculation query

I have a query that checks a lat,lon pair with each coordinate column in a PostgreSQL table. Then gets the shortest distance like so: SELECT A.id, A.name, similarity(A.name, %s) AS sim, ...
• 191
1 vote
252 views

Point to Polyline Distance & Angle ArcGIS Pro

Using ArcGIS Pro Advanced license 3.0.3 I have a dataset of 200 or so lines. The task is to calculate the distance between these lines on the right and the left of the line at given intervals. ...
• 21
355 views

Connecting points to the nearest point with a similar value in QGIS

I have a point shapefile and am trying to create lines connecting each point to the nearest other point with a similar value, based on one of its attributes. Specifically, the points are polygon ...
85 views

Finding two nearest line features to each point

I am using ArcMap I have hundreds of points as a point shape file and also a polyline feature class as another shape file. Problem: I need to know two most nearest polyline IDs to each point. What I ...
253 views

Radius in nn2() in RANN package

I was trying to use the solution offered here to find all the location from df which are within the 70 km distance from my point of interest userLocation=c(6.9,55,2), but it does not work properly. ...
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