Questions tagged [proximity]

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

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24 views

Finding lat/longs within 500 feet of other lat/longs in PostGIS

I have a table crashes with data on car crashes in New York City and a table locations with data on schools in New York City. I'm trying to return a table indicating whether each crash occurred within ...
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18 views

Adding field to shapefile that contains measurment [closed]

I have a shapefile (plots) that consists of 3 different plots, a shapefile that contains schools (points) and another shapefile roads (polylines) I would like to add a field/variable to the shapefile &...
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16 views

Looking for exact geocoordinates and/or zip code of location of nearest hub identified with "Distance to nearest hub"

I used the "Distance to nearest hub (line to hub)" tool from the QGIS processing toolbox to determine the distance between over 8.000 polygon centroids and a line layer. That worked ...
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1answer
45 views

Identifying neighbouring polygons but field calculator preview and output are different

I'm really struggling trying to create a field which lists the neighbouring cells of my grid. I have a grid of 814 cells, and for most cells (i.e. the ones which are fully surrounded) there are eight ...
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22 views

How to run gdal_proximity in python rather than command line?

I have a folder of raster files, each containing a single rasterized polygon, where a value of 1 is burned into the polygon shapes, and where all else is no data (or could be simply changed to 0). I ...
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9 views

How to use 50% Areal Containment Method in ArcGIS Pro with 2010 Census data

I am new to GIS. I am trying to use something called the "50% Areal Containment Method" laid out by Mohai and Saha's 2006 paper. Basically, you create a buffer around a location, then ...
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3answers
159 views

Aggregating result of many to many join of points closest to line in QGIS

I have a layer of points and a second layer of lines. The goal is to know for each line, how many and which points (by "ID") are closest to that line, to then export this information for ...
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2answers
48 views

Finding nearest point of route using ST_DWITHIN

I'm new to PostGIS and distance comparisons and am having some problems with my current project. I have a an array of geopoints (long lat) which correspond to a route. And I need to find the nearest ...
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1answer
94 views

Black output when using "Proximity (raster distance)" in QGIS

I am using the "Proximity (raster distance)" tool in QGIS to calculate the distance from each pixel to the nearby forest. I created the proximity map using the forest raster as input but the ...
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1answer
42 views

Joining hub and spoke points by lines using Virtual Layer

I have two shape points as shown in image below. Point 1 represents the connectivity nodes (hub) Point 2 shows the address(spoke) How to connect each hub (connectivity nodes) to nearest spoke(...
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1answer
60 views

Nearest neighbor analysis to pick the next closest waypoint

I'm looking for a QGIS solution to do a nearest neighbor analysis on a set of waypoints that I have as X Y points. When the points are loaded into the planning software (loaded as waypoints) they draw ...
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1answer
41 views

Generating paths from proximity map in QGIS

I'm trying to generate paths from proximity map in QGIS, is there a way to convert the light areas into vector lines?
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2answers
142 views

Finding the distance between two lines in QGIS

I want to find two lines which are very close to each other within the same layer (spatially). See the image below: There are two lines which are very close (distance of ~18 cm). I wanted to find such ...
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3answers
401 views

Selecting the number of nearest points in QGIS

I have loaded a CSV file (includes points with elevation) in QGIS. I want to select exactly 1000 points in a specific area. My idea is to select one point and then to include all nearest points to him ...
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0answers
27 views

Unknown large number outside raster proximity layer (QGIS)

I am using QGIS and created a raster proximity layer, values outside of the fixed distance are coming up with the value 65,535. I created a binary raster layer for the presence of peat soil (1) and ...
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2answers
63 views

What tool do I need to visualize world map with straight border while keeping its area and neighboring countries

I am fairly new to data visualization. My goal is: Turning country area into right angled polygon with same area Keeping the neighboring country tangent to its new border Finding the new arrangement ...
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1answer
23 views

ArcMap near table but with taxicab geometry

ArcMap 10.4.0.5524 for Desktop. No internet connection. I have a shapefile with ~ 200,000 line segments that connect at the vertices to form a network. I would like to generate a table with the 1000 ...
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18 views

Determining distance from drainage point to wildfire shapefiles using ArcGIS Pro

I am having some trouble on how to calculate the wildfire distance from the nearest drainage in respect to nearby lakes (images provided). My research involves observing the water quality of multiple ...
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0answers
9 views

How to find average distance of points in polygon to boundary of polygons?

I have a layer of polygons and a layer of points that I lay on top of those polygons. Some polygons, which I will refer to here as "zones", will contain 1 point within their boundary, and ...
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0answers
51 views

Calculating minimum distance between point and border using R

I want to generate the shortest distance between this province's capital to the China border. I want to calculate a minimum distance between a point and a border using R. My code is as follows, but ...
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0answers
22 views

Most efficient way to find distance of points from inner border of polygons

Problem: I have a points layer and a polygons layer. I have already used the Near tool to find the distances from points to the closest polygons, but it gives me a 0 value for all points that ...
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2answers
75 views

Calculating number of points within 400 meters along network route

I have a layer with (several thousand) addresses, for every one I need to find the number of shops (155 total) within a 400 meter road network. Because of the large number I need to find a tool to use ...
3
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1answer
54 views

Getting distance between two points within polygon in QGIS

In QGIS 3.10 I have two layers, first one is point layer and the second one is polygon layer. Every two points (with same "ID") in my point layer overlay with a single polygon in polygon ...
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0answers
39 views

Join by nearest Error: Could not convert value "LSU" to target type

I am trying to join a point shapefile to nearby sampling locations in the Graphical Modeler, but the following red text appears in the model log: Feature could not be written to ...
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1answer
51 views

Joining points to closest line with summary of attributes using GeoPandas

I have a streets line dataset and a GPS Ping point dataset which contains speed. I'm trying to join the points to the closest street within 15m to get an average speed along each segment. More details:...
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1answer
58 views

Calculating distance from polygon to nearest polyline using QGIS

I have a village shapefile of India and a river shapefile containing major rivers and tributaries polylines of India. How do I calculate the distance between any village and the river nearest to it ...
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1answer
239 views

Calculating the nearest neighbour using given road network in QGIS

I have the following information/layer: Address points (point layer) Points which represent the entries to urban green spaces (point layer) - I built these cutting the roads with the borders of a ...
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3answers
340 views

Finding nearest neighbor with smaller attribute value in QGIS for a huge dataset: make expression more efficient

The setting I have a Geopackage point layer in QGIS 3.18 with over 350.000 features for an area of about 1700 km² (extent ca. 50*60 km), representing centroids of buildings. The points contain an ...
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18 views

Measuring distance between point to polyline using ArcMap

There are two lines A : polyline B : Axis I created points along the line B with same interval using 'generated points along lines' tool of ArcMap. I would like to measure the distance between these ...
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1answer
45 views

Determining distance between point feature and nearest point feature in same layer

I have one layer which contains school locations. What I want to do is find the nearest distance between these point features. Keep in mind it's one layer. Any solution? I'm using ArcGIS Desktop.
4
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2answers
351 views

Closest point on 5km line

Given a point and a line, I am trying to determine the point on the line that is closest to the given point. The given point is always at least fairly close to the line (3-4 meters max) Originally I ...
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0answers
41 views

Selecting, sorting, and grouping spatial data (lines) by length and proximity

I'm working on a project where I have a bunch of lines inside of polygonal land parcels. Here's a rough sketch of what I'm talking about: I need to further subdivide these parcels into sections that ...
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0answers
16 views

Adding nearest point-(features) to attribute table

Using QGIS I'd like to add the (10) nearest random points, that I created within a polygon, to a target point and have their distances to said point added to that point's attribute table. I'd like to ...
4
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1answer
182 views

Getting values from adjacent polygons or nearest point

I have joined temperature values from the point layer to intersecting polygons but I have few polygons (yellow in the image) that don't contain any point data. Can I somehow get average temperature ...
4
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1answer
101 views

Get the attribute of the nearest line to a polygon

In QGIS, how could I get the attribute of the nearest line to a polygon with an expression (or virtual layer)? I wish to create a new field in the polygon layer(in this case the parcels) with the ...
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0answers
17 views

Graph showing proximity of two objects over time [closed]

I have a dataset showing time and location data for two moving objects (eg B & D). I want to make a graph which shows how close (difference between LAT/LON) two objects (B & D) have been ...
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0answers
110 views

Finding nearest points based on distance and the user location and display on a Folium or Leaflet map?

I want to display the nearest 'services' points using the distance function on the Folium map. I need to pass the user location from the form and find the nearest services based on the current ...
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1answer
46 views

Gathering information from point to nearest polygon in QGIS

I am using QGIS and would like to know what is the nearest vegetation type from a point (animal location) to nearest polygon. What tool I should use?
2
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1answer
62 views

Mapping distance of animal locations to water points in dry and wet season

I have shapefiles of location data for around 40 collared animals as well as a shapefile layer of water points. I want to find out how water affects the movement of the collared animals. I thought of ...
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1answer
33 views

Conceptual advice on proximity analyses in arcpy

I have a question concerning proximity analyses in arcpy (ArcGIS 10.7). Forgive me if it takes a while to explain, but I've added a figure below to illustrate my problem. Explanation I'm trying to ...
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0answers
16 views

How to combine neighboring parcels to find maximum stream length per parcel combination - ArcMap

I am typically assigned with the task of finding parcels in a watershed which have the highest linear footage of stream running through them. For this I can simply intersect my stream layer with my ...
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1answer
52 views

Calculating nearest distance between two Linestrings using R

I have two simulated linestrings, one that represents a satellite ground-track and the other representing a linear surface feature (e.g., a road or river). I am trying to calculate the minimum ...
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1answer
67 views

Spatial Interactions - ArcGIS Online - Query based on mouse-click

I have a web map, authored and deployed as a web app. It contains a series of points and lines. I was wondering if it was possible to create an ability to click anywhere on the map, and have the ...
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0answers
30 views

Filtering duplicate records using space and time overlap

I have a dataset consisting of about 23,000 fire incidents obtained from years of fire brigade reports. The incidents have a lat, lon, and timestamp. The problem is that in the case when two (or more) ...
4
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1answer
38 views

Adding field by proximity using ArcMap

I'm using ArcMap with the Basic license. I have turnout gates (points) on or very close to irrigation facilities (lines). The irrigation facilities have a field for type (canal, pipeline, culvert, etc....
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1answer
35 views

Identifying polygons that lie between two polygons using ArcMap

I am working on a single layer which includes an island constructed of multiple polygons (used to represent territories). I would like to look at dispersal between territories, specifically, how many ...
6
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1answer
156 views

Finding nearest street name from selected point using ArcPy

There are two data layers with house numbers and street. My house numbers are point type, and my street layer with road names is line type. What I want to do in my project is to find 15 meters near ...
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1answer
35 views

Finding distance between point layer and matching polygon layer using ArcGIS Pro

I have two points (GPS photo coordinates) per polygon (area photo is taken). The two points have an identifier that links both to their corresponding polygon, so I already know each polygon will have ...
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1answer
14 views

Choosing tool to add field based on nearest neighbor using ArcMap

Using ArcMap, I have two feature classes. The first is my polygon parcel layer with crop type, irrigation type, owner, etc. The second is my line canal layer, which has a field for our water schedule (...
10
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1answer
319 views

How do I interpret the results from the distance matrix?

In this dataset I have created the green dots represent coyote sightings while the yellow dots represent rabbit sightings. I am trying to determine if coyotes and rabbits are randomly distributed or ...

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