The measure of separation between two entities or locations that may or may not be connected, such as two points.

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19 views

calculate latitude and longitude from a point with distance and azimuth [on hold]

I'm working on a project where I have a starting latitude/longitude. I have calculated the azimuth and have a distance. I am trying to solve the ending point, but the math is comfortably beyond me ...
1
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0answers
25 views

Is there any difference between gdal_proximity.py and ArcGIS Euclidean Distance?

The gdal_proximity.py description says: The gdal_proximity.py script generates a raster proximity map indicating the distance from the center of each pixel to the center of the nearest pixel ...
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0answers
54 views

Finding loneliest place on earth? [on hold]

I would like to travel to the loneliest place on earth. I define it as being the farthest from any human settlement. The place has to be on the land and not in the sea. I tried to google, but couldn'...
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0answers
19 views

Huge discrepancy between Google Earth and Google Map Developers

While measuring out the distance from Memphis, TN to a place in Israel (6614.68 statute miles) I noticed a 6.37 miles discrepancy between Google Map Developers (www.mapdevelopers.com) and Google Earth ...
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1answer
14 views

Remoteness Measurements or Accessibility Models in Rural Areas in Africa

I have a points shapefile (villages) that are located in remote areas in Africa. I need to give each village a measure of "remoteness." I dont just want to do a "as the crow flies" calculation from ...
2
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1answer
44 views

Distance to coast in specific direction

I have a point layer and want to know the distance to the coastline (line or polygon layer) from each point in a series of directions (0, 10, 20, 30 degrees, etc). I have found this python script (...
-1
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0answers
37 views

How to get the nearest building to a point in Openstreetmap Python [on hold]

my goal is to get the distance to the nearest building from a point using Python and OpenStreetMap database. I already know the use of overpass API for obtaining the buildings around a certain point, ...
2
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1answer
66 views

QGIS: calculate distance between points

I'm using QGIS 2.8. I need to calculate the distance between points depending on points ID (not nearest point). I have a CSV table including points ID and coordinates. Each point is referenced on 2 ...
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1answer
31 views

QGIS _Distance from point to polygon- doubt

I want to calculate the distance between a shp of points and a shp with a few polygons. I am using MMQGIS (Hub distances), a UTM coordinate system, and everything works fine, but I think it is giving ...
2
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2answers
28 views

Postgis meassuring distance between first and third points of a polygon

I am using ST_DumpPoints() function first to get the list of the different points in the polygon but after doing that, the first point is in one record and the third point is in another record and I ...
2
votes
1answer
56 views

Computing distance between two points following network and doing it for 100.000 points?

My starting data : a collection of points which are buildings a collection of points which are electrical transformation plant a network of vectors which is the public electric network from an ...
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1answer
20 views

Stream network distance between specific paired points [duplicate]

I have a stream network dataset and am attempting to do a distance analysis between paired points located in two different layers. Ex. I have 500 points in layer A with given coordinates, and then 500 ...
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1answer
57 views

What's the difference between planar and Euclidean distance?

I wanted a straight-line distance. When I was calculating near distance on Arc GIS, I was only given the option between planar and geodesic distance. But people in my field keep referring to my ...
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0answers
14 views

What is the relationship between the bearing the 'road' distance between two points?

Given the two points, we know how to calculate the shortest distance between them, and the bearing from one point, in order to reach the other point. Also, we know the loxodromic distance between ...
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1answer
29 views

Getting distance between two points in pixels using OpenLayers 3?

How can I create a circle feature that will have a constant radius in pixels even on zoom in and zoom out?
3
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1answer
58 views

inaccurate distance measurements in Python

I've tried several ways of measuring the distance between two points in my Django application and comparing the results to a reliable measurement. My numbers are way off. For example, I'm assuming the ...
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3answers
37 views

Tool to find the nearest points in one layer, ArcGIS

How can I find nearest points in the same layer in ArcMap? I would like to find points that are in the distance of less then 0,5m.
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1answer
22 views

Can I statistically smooth attributes spatially (using distance/surrounding polygons) in ArcGIS?

I have Census Areas with some of the Census attributes. Is it possible to take an attribute, for example, percentage of people in full time employment, and derive a spatially smoothed version of the ...
2
votes
1answer
69 views

How to select points with MINIMUM distance of 10 km from a vector line in a country?

Let's do it simple: I have a huge amount of points and some lines in my QGIS map. I want to do a selection just of those points that are minimum 10 km far from the line. Any idea? (I have no ...
4
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1answer
63 views

Calculating distance between points of the same layer

I am using QGIS 2.13 and a layer with hundreds of points. I need to calculate the distance to the nearest point... in the same layer. I tried the distance matrix but I get 0m since the "closest" point ...
3
votes
2answers
72 views

Calculate distances between records in two tables

I need to identify the nearest 3 childminders (approx 500 records) to the nearest school (approx 120 records). Both the childminders and schools layers reside in PostGIS. Can anyone offer any ...
0
votes
1answer
43 views

How to find the distance between neighboring points in ArcGIS 10.3?

I have two shape files: one has point features indicating urban centers, the other is a polygon features file that has counties. Each county has one urban center. There are around 2800 counties. I ...
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0answers
13 views

Creating clusters based on nearest distance attribute in ArcMap using ModelBuilder

I am attempting to create a tool via modelbuilder that creates clustering for a polygon feature class based on the distance field attribute (between one polygon to another) that I have created using ...
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0answers
15 views

Wrong corners distance by geopy's Vincenty Distance formula

I try to calculate distances between corners in raster map. I use answer from this How to get raster corner coordinates using Python GDAL bindings? and make my code. But for some maps results is ...
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1answer
17 views

How to solve “features were not reachable” warning message using v.net.distance in GRASS

I'm using GRASS 7.0.4 under Linuxmint 17.1 KDE. I need to build a raster with the shortest distance from every pixel to a city following a road. I have two shape files, the city (point) and the road (...
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1answer
31 views

Why distance calculated via pixel size in GeoTiff (EPSG:3857) not equal to Google map or ::skyglyph distance?

I need to understand what's wrong with distance calculated via pixel size. I try to calculate vertical size of GeoTIFF with EPSG:3857. Vertical size in pixels is 4001 pixels and in map units is 2654....
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0answers
43 views

ST_Distance between ST_Centroid and ST_Y

I'm trying to make a ST_Distance between a ST_Centroid and a ST_Y... But ST_Centroid is a geometry and ST_Y is a float. How can I make this? My query: SELECT ST_Distance(ST_Centroid(ST_Collect(...
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0answers
49 views

Getting distance from nearest stream and elevation to nearest stream?

I need to know if there are simple commands for this 2 points: the distance from the nearest stream, D [m], defined as the length of the path that hydrologically connects the location under exam to ...
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1answer
20 views

Distance between locations confilct?

Occasionally experimenting in arcmap with openstreetmaps basemap and in google maps i noticed something strange. I measure the distance of 2 locations in google maps (screenshot 1) and on another ...
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0answers
14 views

QGIS distance matrix projection and alternative output format [closed]

I have around 200 thousand cities around the globe and are in a point shapefile with equidistant conic projection. I use ArcGIS and QGIS but have two problems: When I use distance matrix tool, it ...
3
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2answers
53 views

Distance Matrix of two datasets

I have two datasets of the same adresses, one geocoded with Google, the other with Nominatim. Now I want to compare address1 of dataset1 with address1 of dataset2, then address2 of dataset2 with ...
3
votes
2answers
42 views

Finding distance between points in two different layers along route in ArcMap?

I need to find the distance between points in separate layers along a stream network. I have source sites for macro-invertebrates and sites where they are lacking. I need to find the distance between ...
3
votes
0answers
47 views

Find Distance Between Two Polygons

Given two polygons (point, line, or up to 8 vertices) I need to be able to calculate the shortest distance between them via code I write or a call to an API (I haven't been able to find one that does ...
0
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0answers
17 views

Finding closest feature to known point based on road layer?

I am using ArcGIS 10.2, standard I have 3 files: Facilities Storage Road I want to find the closest storage location to our facilities based on the road layer. The spatial join tool doesn't ...
2
votes
2answers
45 views

PostGIS distance between multiple points

I have a data set in a PostGIS data base (table name is animals) with the following structure: id (int, pk) | latitude (double) | longitude (double) | type (char) | geom (srid: 4326) In the type-...
1
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0answers
31 views

R script for find the minimum distance [closed]

I need an R code to select which polygon in a shapefile has got the minimum distance from a given point.
0
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0answers
52 views

Call gdal_proximity() from R

I have a raster including eight land cover types (pixel values ranged from 1 to 8): > r class : RasterLayer dimensions : 9887, 30532, 301869884 (nrow, ncol, ncell) resolution : 10, 10 (...
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1answer
72 views

Check if point is within radius of another point with Shapely

I've successfully used Shapely with python to check if a point is within one of a set of polygons in a .shp file but now would like to check if a point is within a circle of radius x miles from ...
2
votes
0answers
37 views

Calculate Geometry function returns underestimated distances

I'm making a map of the Colorado Trail and obtained a set of waypoints taken down the entire trail. I projected the set of waypoints from WGS84 (unprojected) to NAD 83 UTM13N after adding to the data ...
0
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1answer
47 views

How to calculate distance from point to nearest polygoin via road network (polyline) ARCMap 10.3.1

Using ArcMap, is it possible calculate distance from a postcode (point) to nearest polygon using a road network layer (polyline)? As opposed to just calculating Euclidean distance?
3
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2answers
51 views

How to calculate shortest distance from start to end of river?

How can I calculate the straight distance from the start to the end point of a river (red line in image)? I don't know how to do this automatically.
0
votes
1answer
23 views

How to I change the extents of a Euclidian Distance Raster?

I am calculating the Euclidean distance of a set of points. The output raster truncates the resulting raster image to the farthest north, south, east, and west point. I need the distances to extend ...
4
votes
0answers
29 views

Calculating distances (differences?) between two regions?

I am building a machine learning system which predicts the location of tweets as a bounding box (using the google maps API among other things). Since the twitter API also supplies a bounding box, I am ...
0
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0answers
68 views

Shortest distance over water in ArcGIS?

I'm using ArcGIS 10.2 with an advanced license. I'm trying to calculate the shortest distance over water between points (between survey locations at sea, and seabird colonies on land). I have a large ...
1
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0answers
24 views

Measure the distance between points automatically

How can I measure the distance between points referring to the same element in an automated way? In fact I've imported in QGIS buildings downloaded from two different sources and obviously they are ...
1
vote
0answers
56 views

Find distance from points along lines [closed]

I have two layers, one is a point layer of schools and another is a polyline layer of streets. The end goal is to create a buffer along the lines that is 20 feet from the centerline that goes 1 mile ...
2
votes
1answer
48 views

For Loop Maximum Minimum Distance Between Two Lines

I have a table of line/lane ids in a table called matched_lanes, and I am trying to create a lateral query that on each id in the table to find the maximumum minimum distance between each point. I.e....
1
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2answers
37 views

Counting points within range using CartoDB?

I have a dataset of users location and want to assign per user how many other users they have within a given range, and updating this value into a table.The dataset name is "users_20160410" and the ...
1
vote
1answer
62 views

Network Analysis

I'm doing network analysis where i'm trying to analyze which point feature has the closest distance to a highway. I have created the points that I need and I also have the network dataset, but then i ...
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0answers
22 views

Calculating the distance between points and parts of a underlying raster set

I need your help with a calculation of the distance between points (cities in this case) and forest (raster data). Is there a possibility to collate to every city the distance to the nearest forest ...