Questions tagged [distance]
The measure of separation between two entities or locations that may or may not be connected, such as two points.
1,293
questions
4
votes
1answer
115 views
Distance between points along line
How do I determine the distance between points to the neighbor point that connected via the line(road)?
In QGIS 3.8.3 I have tried v.distance and v.net.distance but they do not help.
The line(roads) ...
0
votes
0answers
20 views
Calculate shortest car distance — repeated over many points
I am using QGIS 3.10.
I have a dataset with coordinates of many households. Separately I have coordinates of a number of sites. For each of these households, I need to calculate:
Which is their ...
2
votes
0answers
43 views
NNJoin in QGIS does not return any distance
I have two layers, one with ~100,000 points, and another with ~20 polygons.
I'm trying to find:
a. which polygon a point belongs to
b. the distance from the point to that polygon
I understand that ...
6
votes
4answers
23k views
Measuring distance between points using QGIS
I have a layer with about 500 single points. Now I want to measure the distance between each of these points and one specified observation point.
I need the distance to show how far away from the ...
21
votes
3answers
31k views
Adding Direction and Distance into Attribute table
I just want to add direction (Bearing: i.e N 25 35 E) and Distance (Length: 125 meters) as my new field in polyline/line data.
Is there a Plugin to generate these fields?
I tried to used "Export/...
0
votes
1answer
92 views
Calculating Euclidean distance in ArcGIS
I am willing to model the distribution of an amphibian species in relation to climate and land cover in MaxEnt. For this I have downloaded the WorldClim data and the Global Consensus Land Cover (https:...
1
vote
1answer
32 views
Is there a quick way to calculate the change in an attribute over distance?
I am working in QGIS 3.14.0 and have a set of point data input via latitude and longitude in a CSV file; this file also includes data taken at these points. I would like to visualize the change in ...
4
votes
2answers
131 views
Measure shortest distance between all points in a layer and a polygon's border line
How do I measure the distance between all points in a vector layer and a polygon (not to the polygon centroid, but to it's border line)?
In the image points are fires and the polygon is a National ...
1
vote
1answer
31 views
How to get most accurate Point-Point distance queries in Europe with Spatialite
I have a GeoDjango app, currently on PostGIS, which I am converting to use Spatialite db instead. I have no specialised knowledge about GIS systems :(
The locations table has a Geography column ...
0
votes
2answers
69 views
Why are the 500 meters not 500 meters? And how do I add 500 meters in x/y direction to a lat/lon point?
I wanted to create a square cell on a map with size 500m times 500m. Therefore, I wrote the following code:
from pyproj import Transformer
bl_lat, bl_lon = 40.64423086189233, -74.0307935018417
...
-3
votes
1answer
49 views
Is there an Excel, Stata, MATLAB, R or Python program or online website that converts geo-coordinates to distance at large scale? [closed]
I have the geo-coordinates (latitude and longitude) for more than 1000 counties (in Excel) in the US, and I want to know their distances to a particular county with known geo-coordinate.
Is there an ...
3
votes
1answer
651 views
Calculating minimum distance in meters of two polygons (defined in lat/long)
I need to calculate the minimum distance (in meters) of two polygons which are defined in lat/long coordinates (EPSG:4326) using Python.
shapely geometries have distance() method which almost does ...
0
votes
1answer
49 views
ST_HausdorffDistance() mismatch
I have been using PostGIS 3.0. The ST_HausdorffDistance() function calculates a symmetric distance between two polygons. However, Hausdorff distance is not a metric since it is the maximum distance ...
0
votes
1answer
52 views
Appropriate CRS for Close Distances in USA
I have a very big dataset in the form of longitude-latitude points in the US; with points from the entirety of contiguous US. I need to calculate the distances between points and check if they are ...
1
vote
1answer
52 views
Measure length (in pixels) between multiple points on an image?
I have a fairly high resolution map (jpg, not vector), with a known scale. How to measure the length in pixels between multiple points on an image? For a straight line it is simple, but how to do it ...
1
vote
1answer
203 views
Calculating length of polyline defined by list of coordinates using Python
I have a list of coordinates, knowing that I am working using EPSG:4326 and using Python I would like to calculate the length in kilometres of the polyline defined by these coordinates.
Coords = [(0.0,...
0
votes
1answer
67 views
Apply symbology based on an algorithm (ArcGIS)
Been battling this problem for a long time now, so hoping someone here can shed light on a possible solution. The problem is that I have 100 points and I want to apply a color palette to the points so ...
1
vote
2answers
63 views
Calculating furthest distance from a pipeline line segment to a road line segment in QGIS
I am currently using the v.distance GRASS tool to calculate distances, but it naturally gives the nearest (shortest) distances. Oddly enough, I would like to find the furthest distance from a ...
1
vote
1answer
581 views
Python: Open a (line) shapefile and calculate distance to point given as a longitude-latitude tuple
I have a Pandas dataframe in Python with longitude and latitude values of certain locations (see sample below):
Index Long Lat
0 -98.58 ...
4
votes
2answers
2k views
Calculating distance from polygon to point
t1 = Polygon([(4.338074,50.848677), (4.344961,50.833264), (4.366227,50.840809), (4.367945,50.852455), (4.346693,50.858306)])
t = geopandas.GeoSeries(t1)
t.crs = {'init':'espg:4326'}
t2 = geopandas....
0
votes
0answers
59 views
QGIS 3x calculate distance between two points with coordinates
I have a problem, very similar to Calculating distance between two points with coordinates using ArcGIS Desktop where I would like to calculate the distance between two polygons (circles) with their ...
2
votes
0answers
40 views
Splitting lines at multiple points in ArcGIS
I have two shapefiles:
First shapefile consists of lines features (approx 1500); it represents the public transport lines
Second shapefile consists of point features (approx 3000); it represents the ...
3
votes
3answers
1k views
Calculating distance travelled along track in QGIS?
I'm new to GIS.
I have some tracks of people walking from point A to point B that I took using breadcrumbing with Garmin e-trex (set on the Auto track settings). I've loaded the tracks into QGIS and ...
0
votes
0answers
43 views
Polygon buffer by distance
I am working with a world map shape file in the Spherical Equidistant Projection (Equirectangular) in QGIS 3.4. When creating a buffer using the VectorGeometry>Buffer function set for distance in ...
1
vote
0answers
71 views
Faster st_is_within_distance for points to lines
I am looking for a fast way to run a st_is_within_distance (or equivalent) in R, to find all the lines (y) within a given distance of each point (x). (This would be an equivalent of ArcGIS's "...
2
votes
1answer
42 views
When to use spatial regression for the proximity analysis
I am not sure about whether I should use spatial regression for the proximity analysis I am trying to do.
I’ll just describe the scenario and goal:
People claim that convenience stores lower nearby ...
0
votes
0answers
28 views
Does Euclidean distance consider multiple points nearby?
I have a hypothetical setting I am trying to use to better understand Euclidean distance. So of course this example will only work for the purpose of understanding a concept, rather than actually ...
2
votes
1answer
39 views
QGIS 3x automeasure distance for all lines in the layer
I have got 2 lines in my layer. I would like to measure their distance automatically.
I found the tool, which might be helpful. This is the v.distance algorithm in GRASS, as advised in the link below:
...
-4
votes
1answer
865 views
Calculating distance for each point along line in ArcGIS Desktop? [duplicate]
I have a polyline(Roads network) and points(Nodes) recorded along the line. I would like to calculate the distance for each point along the line in ArcGIS 10.1. Result will added in a new column and ...
1
vote
0answers
23 views
Add the distance along the route for intersection points of polylines
I have two sets of polylines, illustrated in the screenshot (roads in purple and bridges in blue). I want to find the distance along the route for intersection point of each bridges from the starting ...
6
votes
1answer
112 views
Haversine based distance transform
I have a binary image with pixel resolution in units of degrees (EPSG:4326):
In this case, all the light-blue pixels are water (value = 1) and purple pixels are not water (value = 0). I would like to ...
0
votes
1answer
76 views
Find distance between two points by following a polyline in R
I have a polyline shapefile that follows the center of a stream, and I have coordinates for animal positions within the stream (not necessarily immediately on the line), and I am trying to calculate ...
1
vote
0answers
105 views
MapWinGIS Create Buffer Using Data That Has WGS84 Coordinate System
I am using MapWinGIS with c#. I am trying to create a buffer for a polygon that has WGS84 decimal degree reference system, but it never get displayed.
Here is my code:
// Form load
var gp = new ...
2
votes
1answer
105 views
ST_DWithin exponentially slow. Cannot find what I am doing wrong
PostGIS version: 3.1
PostgreSQL version: 12.3
The machine I am working with has: 126G RAM, 48 CPU cores
Info:
I am getting started with PostGIS.
My goal is to get all the matching data between two ...
0
votes
0answers
14 views
How calculate distance of two points (between my location and previously my location) in JavaScript?
I am using JavaScript and geolocalisation but I want to calculate the distance between my previous location and new location.
How can I do this?
2
votes
1answer
29 views
Distance from one city to others by a mutual ID
I don't understand spatial.data at all. I have been studying but I'm missing something.
What I have: data.frame enterprises with the columns: id, parent_subsidiary, city_cod.
What I need: the mean and ...
1
vote
0answers
73 views
Distance between two points within a polygon (or raster value) in R
I'm trying to get the shortest distance between each point in a a set of coordinates (lat/long) within a body of water. However, straight line distances don't work because the points represent the ...
22
votes
5answers
125k views
Find features within given coordinates and distance using MySQL
I have a MySQL table with user name, latitude and longitude of the user.
I would like to get a list of users who are inside the circle or square of a given latitude and longitude with given distance. ...
0
votes
1answer
44 views
Getting maximum distance for point features in the same point group
For each group I want to find the maximum point-to-point distance (and which of the id1 features participate in the max).
For example, if I have the following attribute table:
FID Long Lat id1 ...
1
vote
2answers
138 views
QGIS - From a point along a line (centreline), find the longest line to the centreline, without crossing a polygon boundary
https://onedrive.live.com/embed?cid=AEC7953479B58DC0&resid=AEC7953479B58DC0%218329&authkey=AKHlm_SovPNQOYw
I have a series of points (ObservationPoints.shp) along a line (Centreline.shp). I am ...
1
vote
0answers
85 views
Find the nearest point on polygon (coastline)
In python I have a shapely polygon (which defines the coastline of the UK), given a point within the UK I would like to find the closest point on the polygon (coastline) to that point. I have been ...
2
votes
1answer
68 views
Calculate the distance between two points on a sphere (earth) going through the earth?
I can see the formula and name of the term for the distance between any two points on a sphere when going around the surface of the sphere is the great-circle distance, or orthodromic distance.
What ...
3
votes
2answers
2k views
Calculated distance doesn't match Google Earth
I have a google earth route that measures 190.1km in Google Earth.
I then pulled down the .kml file, extracted the points and measured them using Vincenty's formula (ellipsoid earth) and got 190.2.
...
0
votes
0answers
12 views
Distance from a point to the two neightbouring points (both directions) in on a polyline of a pipe system
I need to find the distance of a valve to the two neightbouring corners in a piping system.
I have the following shp files:
-Nodes for the valves
-Nodes for the corners
-line layer file of the piping ...
1
vote
0answers
60 views
Techniques for point-level speed calculation from GPS traces
I am working with a GPS dataset where GPS speed is not available, only the lat/lon coordinates and timestamp.
Currently, I calculate point-level speed from rate of distance between two consecutive ...
1
vote
1answer
69 views
How to calculate the distance of points to line in R?
I need the distance from each point of the object found to the transect line.
'id' is a research transect, and 'obj.id' is the object found. in this case, 1 object was found in transect A and 2 ...
1
vote
1answer
77 views
Distance to coastline in meters using Cartopy and Shapely
I am trying to calculate the distance to coastline for some points. Using Cartopy and Shapely, I can calculate the distance in degrees, but that is not very helpful. Perhaps if I could transform the ...
0
votes
0answers
28 views
Plotting bearing and distance from known point in ArcMap
I have bearing and distance estimates of animals from a survey post. I have the coordinates of the survey post and I already have that in GIS.
How do I plot these bearing and distance estimates as ...
1
vote
1answer
35 views
About distance between two coordinates streets?
Let's suppose there are two places coordinates (street places).
I know that straight direction between them I can calculate by formula.
Also we know that route between those coordinates can be ...
1
vote
0answers
32 views
How to calculate a service area of a facility, while using multiple co-variables?
Problem we would like to solve is finding out what methods are to calculate the most efficient routes in a map with distance/travel time, pop density and facility capacity as co-variables! Perhaps ...
