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

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15 views

How to measure the distance between multiple points and multiple polygons?

I'm trying to find a quick and accuarate way to measure the distance between 3 survey sites and all the designated sites within 10km. The survey sites are on a point vector layer and the designated ...
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15 views

CartoDB: Calculating distance between points in two tables and including the name of the second point in infowindow

I am plotting community gardens in CartoDB and want to show the nearest subway entrance in the infowindow. I have two tables with the location of the gardens and the subway stations. I am able to get ...
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44 views

Hex grid on 4326 globe (for use in leaflet)

Im looking for a way to evenly distribute a hexagon grid (x,y,z) on the 4326 globe. Knowing this is not mathematically possible im accepting the following limitations: Poles doesnt need coverage - ...
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10 views

Obtain minor distance given am array of points

I have built a query to obtain the minor distance given a point. SELECT name, city, region, Distance(GeometryFromText('POINT(-56.237076563852 ...
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31 views

Distance sampling bearing new coordinates

I am working on population density of white tailed deer in Peru, using distance sampling. I am stuck trying to find a way to calculate the deer coordinates. I have the observer coordinates who travel ...
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44 views

How to compare the distance given by the GPS (WGS84) with a ground truth given by projection matrix?

I would like to compare the result given by a GPS (WGS84) to a ground truth with only the projection matrix given (So rotation matrix 3x3 and translation vector 3x1). Actually I have a car moving in ...
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60 views

Convert length in decimal degrees to feet

I've got attributes for a length that the Near tool calculated, and it gave them to me in decimal degrees. I need them in feet. Is it possible to do this with the Calculate Field tool? I tried ...
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43 views

nearest point distance in Arc Map

How do you calculate the nearest distance from one XY coordinate to another XY. I'm using Arc Map 10 I went into Arc tool box -> proximity -> then I only have 2 buffering options. But under buffer ...
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11 views

Set of intersection points in trilateration / multilateration [duplicate]

Like in this post I will get a set of points (3 or more) with latitude, longitude and distance (in KM) information to find out the target location. A distance could be about 500 KM. The circles ...
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45 views

Calculate nearest distance in ArcView, XY coordinates

Okay, so basically I am really lost and struggling because I have never used an Arc system before. Basically, I have two datasets. One with house locations, and the other with investment locations- ...
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35 views

How to create a raster of equidistant points with distance in meters using QGIS?

I need a set of equidistant points (like a raster) each in a 1km distance to the next over a certain area, in my case Germany. I know the feature "regular points" in QGIS where I can do just that but ...
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69 views

How do I measure the distance between two points within a country arcmap

I have two shapefiles with points distributed over the whole world. I would like to measure the distance (like the crow flies in km) from each point in shapefile 1 to the closest point from shapefile ...
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43 views

Calculating offset distances perpendicular to parallel lines in shapeile with results written to table using ArcGIS for Desktop?

I have a line shapefile with sets of parallel lines (or sticks on the map) representing the map view of horizontal gas wells that were drilled. I'm looking for tool or Python script to measure the ...
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98 views

Why Haversine formula and Web Mercator give different length between two latlng points?

I am calculating the distance between two points given by latlng. However, Google Maps (i.e., web mercator projection) gives me a longer distance than Haversine formula. Which is the most accurate ...
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81 views

How to compute distances between points and polygon borders?

I have point data and polygon in vector format. For each point, I want the distance from the point to the border of the polygon. However, if the point is inside the polygon, I want negative distance ...
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62 views

How to calculate the distance to the nearest coastline from site locations?

I want to calculate the distance to the nearest coastline from my site locations (point shapefile), and possibly the max distance as well. I am using ArcGIS 10.2 and I already have a shapefile of the ...
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36 views

Distance Measure appears to be wrong in ArcGIS Desktop?

The distances in my shapefile are completely wrong. I got this shapefile online. Does anyone knows what's going on? I attached two pictures. The shapefile is projected as ...
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33 views

Calculating driving distances from a number of post codes to a number of services using QGIS

I am hoping to calculate the driving distance from a large number of post codes to their nearest service. I have used the RoadGraph plugin but this only calculates the distance and time from one ...
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37 views

Distance between point layers [closed]

I have a point layer with geographic boundaries of an area and another point layer with road network. I want to calculate the distance of each point of road network layer to the points of the ...
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64 views

How to delimit point distances in ArcGIS for Desktop per thiessen polgyon

I have 2 shapefiles. The first set contains xy pair for 1100 hospital locations. The second pair contains xy of villages about 7000 that are served by the hospitals. This means each hospital serves ...
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24 views

distance() function in field calculator gives unexpected results

I have two layers both containing points - each point in the first layer has a corresponding point in the second layer (same primary key). One layer has CRS EPSG:27700 and the other layer has ...
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3answers
151 views

How to convert points to lines?

I want to convert these points to lines, however they are not sorted sequentially along a line (by ID or FID), i.e. the converted lines zig-zag across the obvious trail of points. How can I join ...
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1answer
49 views

Buffering line in ArcMap is creating smaller buffer than expected?

When I buffer a point (red dot on image) by 3 miles, it is 3 miles on all sides. When I buffer a line (blue line on image) by 3 miles, it is more like 2.67 miles on the sides parallel to the line. I ...
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24 views

Generate Near Table (path distance)

I have a number of points and want to get path distance to all "wetland" polygons within 1km. This is very easy with eucDistance in Generate near table, is there a was to alter this to give path ...
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17 views

QGIS modal value within distance

I have a vector layer with several values associated to each polygon. I then have a point vector layer. I want to get the mode of each value for polygons within 500 km of each point. I'm not sure how ...
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3answers
80 views

Using GDAL/C++ to calculate distance in meters

I'm using GDAL in C++, with WGS84. I want to calculate distance between two points in meters. The code snippet below tries to find the distance between 25N/75E and 25N/76E. The code, as is, returns ...
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18 views

Distance corresponding to fractions of a minute of lat/long [duplicate]

My GPS is set to degrees minutes fractions of a minute. I am trying to determine the distance represented by a single increment on the Lat and Long of fractions of a minute. IE. traveling from ...
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63 views

Distance of points to nearest polygon edge in ArcGIS 10.2

I have a point feature class that consists of a systematic grid of points across a landscape. I also have a shapefile consisting of several polygons. For each point in the feature class, I'd like to ...
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1answer
25 views

polygon vertex to vertex distance calculation in arcobjects

I have polygon with multipart (donuts) I want to calculate vertex to vertex distance. I tried to get outer ring vertex to vertex distance and it is working. Could you please tell me how to get inner ...
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2answers
56 views

Create buffer along shoreline near sample site

I want to look at the land use on the shoreline of a river relative to a specifc point on the river. I have created a point on the shoreline using the Near tool. Following this I am having trouble. I ...
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44 views

How to create an attribute table from a Euclidean Distance Raster?

I am trying to create an attribute table from an Euclidean Distance Raster. I get the following error: "error 000423: Only single band integer dataset is a valid input". The ED Raster has actually the ...
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2answers
115 views

Calculating average raster to point distances within census tracts

I have some experience using ArcGIS, but mostly with the field calculator in the attribute table/spatial joins, so I apologize if I say something that doesn't make sense. To provide a bit of ...
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1answer
29 views

Distance to object, taking into account size of object

I have a number of polygon features on the edge of a lake feature. I also have sample points throughout the lake feature. I am looking to add some sort of indicator for these points as to how ...
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50 views

SQLite db with FDO geometries: how to assign ID of point in layer A to closest point in Layer B with SpatiaLite?

How can I assign ID of point in layer A to closest point in Layer B with SpatiaLite (find nearest neighbors for each point in A)? For each point stored in table fdo_fc1 I would like to select one, ...
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1answer
63 views

How do I generate a distance table using 2 different point files and a line file?

I have two point datasets, one containing multiple transit stops and the other containing multiple schools. I also have a street line dataset. I need to generate a table that gives me the shortest ...
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1answer
58 views

Postgis ST_Distance query returning inaccurate results

I am using the following query to retrieve records from a postgresql DB @services = Service.select("*, ST_Distance(services.lon_lat, ST_GeomFromText('POINT (lat lon)', 4326)) as ...
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64 views

How to calculate the average point spacing for a layer of points in QGIS?

I have a set of points and want to calculate the average point spacing for further analysis. ArcMap has the 3D Analyst Point File Information for this but I'm searching for an alternative in QGIS. ...
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101 views

QGIS Azimuth and Distance plugin length issue

Relative newbie to QGIS and trying to figure out exactly what I'm doing wrong. A couple days ago I had azimuth and distance working perfectly. I was using it in a different project with different ...
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78 views

Merging rasters which overlap using ArcGIS for Desktop?

I need to merge two rasters which overlap, both indicate distance values. I need the output of the merge to result in the shorter/lower distance value. I am using ArcGIS 10.1. I hope it is more ...
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1answer
123 views

Calculate longitude length in miles

Suppose I have geographic coordinates of "Saratoga, California, USA" as Latitude: 37°15.8298′ N Longitude: 122° 1.3806′ W I know from here that in case of latitude 1° ≈ 69 miles and that ...
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1answer
59 views

Calculating Distances Between Geometry Columns of Differing SRIDs

I am attempting a relatively simple task but have been running into trouble. I have two tables, one which has lat and lon points which were geocoded using google (SRID 3857) and another table which ...
3
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1answer
91 views

Proof of part of haversine formula?

I'm trying to study how to find the distance between two points if their latitudes and longitudes are given. I have a question about the proof of part of the haversine formula given at Math Forum. ...
2
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1answer
119 views

Need to get distance matrix for large set of points on-the-fly

I do not know much about GIS and I do not know much of the jargon. Hopefully you can help me a bit here because I am really unaware of the services and software available. My problem is as follows: ...
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38 views

How to calculate the shortest path to pass on 7.000 UTM points?

Anyone can give me an advice how to calculate the shortest path with a lot of UTM points? In total I have 7000 points, but it can be grouping 100 or 500. I have knowledges about Java and Python for ...
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1answer
34 views

Euclidean distance outside a Polygon (ArcMap)

I got some university coursework to analyse the best potential areas for a residential development project and I'm currently doing multi-criteria evaluation. One of the shapefiles in the dataset given ...
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2answers
210 views

Calculate distance between a set of points: lat and long in QGIS or R

I have shapefiles containing the location of several individuals along several months. Positions were documented with a 30 minutes interval. Tables contain the following data fields: collar (ID), ...
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1answer
57 views

Euclidean Distance between two lines

I have two lines in ArcMap 10.2.2 and was wondering if it is possible to create a raster showing the Euclidean Distance between them. Like to map each cell on one line to its nearest cell on the other ...
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50 views

Given distance (in meters) what is the angle in geographic reference systems? [duplicate]

In QGIS and other systems sometimes I have a layer in geographic reference system (typically WGS84, EPSG:4326) and I'd like to calculate a buffer of say 5000m around a point. So, given a point ...
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47 views

'Find your nearest' type function with a large dataset

In a previous employment, I needed to display a "Distance to stockist" on our website. It would get your current co-ordinates (from a postcode or HTML5 geolocate) and then display a list of nearby ...
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2answers
41 views

Distance to, travel only on one surface

Looking to create a distance to wetland raster. However this travel distance must be through the water only. I have tried setting land to a high cost (e.g. 99) however doing so I have to set each ...