Questions tagged [proximity]
Use for questions about vector features and their proximity or nearness to other features.
519
questions
3
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1
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91
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 ...
- 1,281
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vote
1
answer
60
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
0
votes
1
answer
74
views
Finding nearest OSM link (road) to GPS points in Python
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 ...
0
votes
1
answer
31
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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
0
answers
113
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-...
- 31
0
votes
0
answers
64
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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
0
votes
1
answer
81
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 ...
- 405
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67
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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 ...
2
votes
1
answer
87
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 ...
- 1,441
1
vote
1
answer
196
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
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votes
2
answers
33
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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 ...
6
votes
2
answers
106
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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
2
votes
1
answer
122
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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. ...
- 79
5
votes
1
answer
171
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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 ...
- 1,441
6
votes
3
answers
220
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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 ...
- 4,005
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119
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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
1
answer
136
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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
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0
answers
47
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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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9
votes
1
answer
216
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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 ...
- 899
0
votes
1
answer
113
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
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votes
1
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130
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
-3
votes
1
answer
46
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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
0
votes
1
answer
23
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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
1
vote
0
answers
47
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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
4
votes
2
answers
109
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
2
votes
1
answer
163
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
2
votes
1
answer
1k
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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 = ...
2
votes
1
answer
89
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,
...
- 161
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vote
1
answer
136
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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
2
votes
1
answer
200
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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 ...
0
votes
1
answer
77
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 ...
0
votes
1
answer
196
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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.
...
- 115
2
votes
2
answers
72
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Finding observations by minimum distance in QGIS
I am trying to look at the distance between property sales and crimes committed within city. I want to be able to find all the crime that occurs within 1 mile of each property sold. I am sure that is ...
- 21
6
votes
1
answer
244
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Finding the shortest distance between two selected polygons using PyQGIS
I'm researching the shortest distance between two selected polygons among the number of polygons in a shapefile using PyQGIS. Coding as follows>
layer = iface.activeLayer()
sFeat1 = layer....
- 61
0
votes
0
answers
57
views
QGIS overlay_nearest multi_point type to single_point type layer
This is follow up to this question answer
I have in QGIS 3.22 two point layers:
multipart type point layer
singlepart type point layer
Multipart pointlayer Geometry generator algorithm:
...
- 405
2
votes
1
answer
774
views
Cannot figure out how to reference outer table in nearest neighbor subquery
Running PostGIS 3.2 on PostgreSQL 14.
I have a layer of linestrings with two columns, id and geom.
I am trying to select each feature together with its nearest non-touching neighbor, but I'm getting a ...
- 237
0
votes
1
answer
78
views
Proximity map does not match up with original data
I have a vector layer of paths that I want to create a distance map from. so I converted the layer to a raster layer and ran raster > analysis > promixity on it. the problem is that the result ...
- 113
4
votes
0
answers
47
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Splitting vector layer based on shortest distance to feature in another layer in QGIS
I have two shapefiles of Europe. One is a highly accurate shape of the continent, the other is a map of countries in Europe in 1500, containing the names of all countries as attributes. Sadly, the ...
- 41
2
votes
0
answers
370
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Measuring distance polygons to lines with sjoin_nearest() in GeoPandas [closed]
I am trying to use GeoPandas sjoin_nearest() function to measure the distance from polygons to lines. I have several polygons and I am measuring the distance to the river, which is the green line.
...
- 1,851
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0
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75
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Performing point distance analysis using ArcMap
I have two point feature classes A & B, point A is more dense while point B is less dense, I want to carry out a proximity check for points from point A that is closest to points from point B.
And ...
1
vote
0
answers
39
views
Values from one polygon to another
I am working with QGIS 3.24.2. In the image you can see red buildings (representing a green roof) and the green polygons are gardens.
Every green building has a value to reduce noise pollution in the ...
- 103
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votes
3
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265
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ArcMap : Using "near" with python only on objects with the same ID in 2 shp
I want to calculate distance between polygons and points which are in 2 Shapefiles using "near" function in ArcMap.
In my 2 Shapefiles, each point is related to a specific polygon, there is ...
0
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1
answer
153
views
Excluding certain area around feature using ArcGIS Pro
I have a problem for class where I only need features for a map that are at least 200m away from roads. I have been using the Clip and Near tools to this point, but I'm having trouble finding an "...
- 1
5
votes
2
answers
193
views
Counting number of points in one layer within fixed distance to points in another layer in QGIS
In QGIS 3.22.7 I want to count the number of points on point 'layer B' within 60m of each point on point 'layer A' and add a column to the data on point 'layer A'. What is wrong with the following ...
2
votes
1
answer
221
views
Calculate the minimum distance of a point grid from the nearest point of another layer with QGIS
I have a grid of 1 km points and a separate group of points representing RTK stations. (See image 1)
I want to create a 3rd value for the grid points that is proportional to the nearest reference ...
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1
vote
1
answer
72
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Nearest neighbour analysis with higher elevation using QGIS
How do I calculate the flow that goes through the rainfall drainage points under a railway?
I have two layers:
DT: Point layer with drainage information: DT_id and elevation.
ACA: Point layer with de ...
- 21
0
votes
0
answers
35
views
Identifying points based on spatial proximity to other points in ArcMap
I have two shapefiles. One has location of around 10,000 buildings and the other has location of around 8000 parking lots. I want to identify which parking lot is closest to the building based on ...
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2
votes
1
answer
195
views
Create line from point to two polygon centroids that meet a condition
This is this is a follow up to this question
I have in QGIS ver 3.22 two layers named:
source_point_layer
target_polygon_layer
I want to automatically point with a line from the source_point_layer ...
- 405
1
vote
2
answers
2k
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R - Finding closest point to each point and filtering which points to consider
I'm a beginner in R.
I am working in R with a dataset of bird nest locations and am interested in the distribution of said nests. Specifically, I'd like to find the closest neighbor to each nest as ...
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1
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1
answer
160
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Finding which region is nearest to which stations in R
I have a point dataset of 16 places in Switzerland that looks like these and is called stations
stations <- read_csv("station.csv)
view(stations)
Cityid
x
y
1
611285.549
267664.109
2
600454....
user204173