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

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0answers
39 views

Cost-Distance Tool not producing logical answer

I am working on creating a cost catchment based on Tobler's equation in ArcGIS10.1. I feel confident in my cost surface; it produces a raster where each cell equals the time in hours that it would ...
0
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0answers
22 views

How to measure water ties

I was using Arc Gis to measure water ties from the edge of buildings. It was so easy, I just had to click on a circle and it would show the distance on the bottom of the screen. I would measure from ...
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3answers
79 views

How to determine Distance between points using ArcGIS for Desktop?

I am trying to figure out the distance between points based on 1000+ points using ArcMap 10.2. I have transit stops and am trying to figure out how far from stop 1 to stop 2, stop 2 to stop 3, stop ...
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0answers
22 views

distance surface with qgis on a binary raster map [duplicate]

I'd like to make a distance surface from a binary map in QGIS. I've got road network in a raster format where value 1 means road, 0 means anything else. How can i reclassify the map which indicates ...
1
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0answers
35 views

How to determine distances of points from closest line? (Mapinfo or QGIS) [duplicate]

I have a set of points and a set of lines. I'd like to know distances of the points from the closest line... answering the question "how many points are within 500m to 1000m of one of the lines, how ...
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2answers
90 views

Find closest feature

How can I find the closest feature(coordinates) in a json file from a set lat lon using openlayers. Currently, I get the centroid point(lat,lon) from the selected polygon feature ok, but I Would also ...
4
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3answers
8k views

Find points within a 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 user who are inside the circle or square of a given latitude and longitude with given distance. ...
2
votes
1answer
117 views

Calculating distance scale factor by latitude for Mercator

This was really inconvenient topic to google out - so I'm asking for clarification, did I understood things correctly. I'm talking about measuring short distances in Mercator projection (3857). You ...
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0answers
38 views

calculate distance between points crossing the antimeridian

How can I calculate the distance between two points (lon/lat) if any of the points exceeds the antimeridian (+-180 longitude)? Im using the distVincentyEllipsoid {geosphere} to calculate the shortest ...
3
votes
3answers
270 views

Why is sum of st_length() of segments 20% too big?

I'm running a query to return the total length of some bike paths, from OpenStreetMap. Compared to the known actual length of these paths, they're all a bit too big - something like 10-30%. I know it ...
1
vote
1answer
75 views

How to convert distance into latitude + longitude [duplicate]

I have start point (latitude) I know direction, lets say strictly north, and I want to calculate latitude which is 100 meters above the start point. The same for longitude. I believe there should be ...
1
vote
1answer
54 views

Calculating distance between borders when one polygon inside another polygon?

I am brand new to ArcGIS and having some trouble. I would like to calculate the distances between the border of one polygon to another polygon. However, these polygons overlap. Thus when I use the ...
2
votes
1answer
104 views

Toblers's Hiking Equation and Slope Dilemma

I'm trying to use Toblers's Hiking equation to determine economical backgrounds of some hillforts. The equation is anisotropic which means that the speed of movement that it calculates differs whether ...
1
vote
1answer
64 views

ArcGIS spatial join - WITHIN A DISTANCE including distance

I am applying a spatial join in ArcGIS between points (target features) and lines (join features). I want to have a 1-to-many join, so I use the match option 'within a distance'. So far so good. The ...
4
votes
1answer
82 views

Calculating “travelled distance” of a GPS track without including “stops”

I have a set of GPS tracks from a cycling event and I want to correlate their distance along the route. Problem is: when a rider stops, generally by entering a covered place, GPS keeps logging (low ...
1
vote
1answer
846 views

Radius of Curvature Python/Arc, how access x,y coordinates

I have a polyline in ArcMap 10 and I am able to script the length of the line in Python using this bit of code: #Calculate Radius of Curvature #try: # Import system modules import sys, string, os, ...
1
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0answers
34 views

Distance raster from one raster value (A) to another value (B) while ignoring similar values [closed]

I have two different patch types: A and B I want to get a distance raster from all A types to the closest Type B patch but I don't want the raster to calculate from A to A or B to B. Just A to B. ...
4
votes
2answers
4k views

How to use Distance Matrix tool in QGIS?

I have a point data set. Now there are cluster of points based on a field. So I take out one such cluster which has points with same field.I want to find distance between all the points in cluster and ...
8
votes
3answers
364 views

New to ArcGIS and want to compute distance between two points “as the fish swims”

We have a layer named Hydrography which is the water area for a given assignment. I have a station point and a target point. I need to compute the distance between those two points but inside of the ...
5
votes
1answer
772 views

Shortest distance from point to line (big dataset)

What is the best method to calculate the distance from the nearest road for a series of address points in QGIS, having a very big dataset? (QGIS 2.0.1, Win XP) I read the answers to previous similar ...
0
votes
1answer
43 views

coordinate pairs distances

I am new to GIS and have the following question. My shapefile has several coordinate pairs (x1, y1, x2, y2) and I would like to calculate the distances between the points within one go. Any ...
0
votes
1answer
86 views

Calculating distance between coordinates [duplicate]

I would like to calculate the distances between a list of coordinates (classic GPS coord.). From coordinate A to B from B to C from C to D and so on, and so forth. Is there any program, or website, ...
0
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1answer
28 views

Find Distance within each Raster contiguous cell block

I was asked to find for each Individual Contiguous Forest Block the distances INSIDE of each where it would be the farthest (aka the most isolated) from each forest cell block's respective edges. I ...
3
votes
2answers
323 views

Excel Distance Calculation

Is there a way (preferably in Excel) to calculate the distance (based on lat, lon) between two lists of points? My end goal would be, for example, to have a list of Starbucks and a list of McDonald's, ...
0
votes
1answer
92 views

Cut polylines at intersections in QGIS (or how many km road for each country)

I want to measure how many km a road stand on each country it intersect (i.e. how many km of the european road "E45" stand on Italy, Austria, Germany, and so on). I have a polyline-shapefile with the ...
2
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3answers
1k views

Distance between a line layer and several other line features (arcGIS 9.3 Arcview Licence)

I have a "Drain" line layer (with 150 lines) that I need to calculate the distance from lines to all objects within 120m. I've tried doing a spatial join and its great but I need more than just the ...
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0answers
34 views

Is there any GRASS command to measure the distance between a point in rastermap and another in vector map?

I have a question about WinGRASS 6.4.3. Is there any GRASS script command to measure the distance between a point in rastermap and another in vector map? I have a raster map and a vector map. Raster ...
0
votes
1answer
45 views

Adding Distance (KM and Miles) to a Map using ArcGIS 10.1

Using ArcGIS 10.1, how do you add and show the distance in mile / km markings alongside the marked trails(KM and miles) while using the aforementioned 10.1?
3
votes
2answers
67 views

Distance calculation PostGIS

I've got the following task to solve: I've got two tables; one contains buildings (houses) as points and the other contains train-stations (at_bhf_classified) as points. I need to find out the ...
1
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1answer
209 views

Calculate distance of points along a route QGIS

I have a line layer and a point layer, I need the distance between the first and the last point measured along the line. How can I do that using QGIS? Do I need to know linear reference? I don't ...
3
votes
1answer
98 views

How to calculate distances between several points along network?

I have several points (bicycle share hubs), and I want to calculate the distance between each of them using a network. I want a CSV/XLS that has three headers: hub_id1, hub_id2, distance. I've ...
1
vote
1answer
108 views

Calculate distances between polygon centres in QGIS

Is there a practical way to calculate distances between polygon centroids in QGIS? I have a UK city region map divided into administrative units (1 ward = 1 polygon). I want to represent their ...
8
votes
4answers
7k views

How do I calculate the bounding box for given a distance and latitude/longitude

Hi need to be able to calculate a bounding box or circle for a Given WGS84 latitude and WGS84 longitude, and distance but have no Idea where to start! The distance from the start lat Lon would be 10KM ...
1
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1answer
36 views

How to select polygons by distance to a single polygon in another layer?

I have a shapefile A with a group of polygons, lakes. Now I want to select the polygons(lakes) that are within a specific distance to a polygon in a second shapefile, B, with the polygon a city. In ...
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vote
2answers
47 views

Distance from one point to many polygons

I'm using ArcMap 10.1 and have a shape file of polygons of municipalities. I also have the coordinates of the centroids of the polygons (if I need to use them). I want a column in my attributes table ...
13
votes
4answers
5k views

How to cluster spatial data in R?

I am very new to R, so please bear with me : > I have bunch of data points with latitude and longitude. I want to use R to cluster them based on their distance. I have already taken a look at this ...
2
votes
1answer
3k views

How to find nearest point for each point in current layer?

I have a point layer and want to know the distance of nearest point of current layer for each point in the layer. I found some tools in ArcToolbox about it , but they need two layers for input and ...
3
votes
2answers
30 views

Average Proximity Metric

I'm looking for a metric that gets at average distance to a given feature. For example, for a point in the water, how far, on average, is the land or to what extent is the point surrounded by land. ...
1
vote
1answer
66 views

R: distance from one point to many polygons

OK so I have a spatial polygons data frame, and I have a point of interest. I want to add a row to the SPDF that contains the distance from the centroid of each polygon to this given point. How do I ...
0
votes
1answer
47 views

ArcGIS 10.1 Cost Distance Calculations

I have a study area that is a polygon feature class, and am running the Cost Distance Tool on it in ModelBuilder. However, everytime I run the tool, it only calculates a cost distance and cost ...
0
votes
0answers
32 views

classify lines in shapefile by distance to other lines in same shapefile

I'm using ArcGIS 9.3 (and have XTools Pro). I need to classify each line in a shapefile by how close it is to other lines in the shapefile (ie less than 475 ft, less than 450 ft, less than 425 ft) ...
3
votes
2answers
398 views

What's the difference between vincenty and great circle distance calculations?

Python's geopy package features two distance measurements techniques: Great Circle and Vincenty's formulae. >>> from geopy.distance import great_circle >>> from geopy.distance ...
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0answers
106 views

How to approximate point to segment distance on sphere?

I would like to approximate the distance of a line segment from a reference point on the map (coordinates are gives as lat/lon). In the Cartesian coordinate system I would simply find the closest ...
2
votes
1answer
107 views

GeoDjango: read geometry column in geography field

I have a Django application that needs to work with an existent PostGIS database, apart from its own database. I've configured multidatabase support, created a database router, created models for the ...
5
votes
1answer
338 views

calculate {minimal} distance between polygons in R

I have calculated the surface area of species distributions (merging polygons from shapefiles), but since this area can be comprised of quite distanced polygons, I would like to calculate some measure ...
0
votes
1answer
28 views

Determine when a route enters and leaves a polygon

I have all of the segments of a route from White Horse, YK to Miami, FL. Now I want to determine how many miles I travel in each State / Province. I have Polygons for each State and have been able ...
4
votes
2answers
814 views

What formula is used for distance between 2 points in Google Maps?

What formula is used by Google Maps for calculating the shortest distance between 2 points (having their Lat, Lng coordinates)? Is it purely based on Haversine? Or is it something different? Is there ...
3
votes
1answer
474 views

How to create points at shortest euclidean distance to other points?

So, I have a lot of points, and I need to site three new points so they will be at the shortest euclidean distance between all of the other points. In other words, these three new points that I need ...
0
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3answers
194 views

Computing distance of a georeferenced .jpg to each polygon (town) in a shapefile

I have a .jpg that is a highway that spans multiple towns, and a shapefile with boundaries of these towns. I have georeferenced the .jpg so that it is aligned with the shapefile of the towns. My ...
0
votes
0answers
27 views

QGIS - identifying polygons and distances along the edges of a superset

I have two layers of polygons. layer A is a superset of dissolved polygons from my other layer, B. Using QGIS, how can I determine polygons in B, that lie along the edges of A? There would be some ...