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

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2answers
41 views

Maximum distance to polygon edge

I have a point feature class and a polygon feature class, and each point is located within one polygon. Is there a way to programmatically calculate the distance from each point to the farthest ...
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0answers
14 views

Query all Object within n kilometer Radius with Hibernate Spatial?

I use hibernate spatial attach a geolocation to a car. My card domain class looks like this: import com.vividsolutions.jts.geom.Point class Card { String name Point location } My program is ...
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1answer
31 views

Projection For Measuring Distances

Is it the case that when I use Arc GIS to compute nearest distance from a point to a poly-line/polygon, I need to project them both in an equidistant projection? Note: I am using the near tool. What ...
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1answer
40 views

After how much distance does the x,y coordinate system become noticeably distorted?

I'm working with maritime sensors that give information of moving objects it detects, in azimuth, range and elevation, and we convert it to x,y coordinates for our application to be able to process ...
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1answer
16 views

NNJoin, MMQGIS and Nearest Neighbor QGIS failed to measure shortest distance

I have two layers, one point and one line. I need the distance to the closest line from the point layer. Not NNJoin, MMQGIS nor the distance hub in QGIS provided accurate measures. Any ideas?
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1answer
27 views

CartoDB (PostGIS) near function (distance) points to polygons

I have a CartoDB map here: Link: https://dms2203.cartodb.com/viz/78db6c02-3148-11e5-a42f-0e018d66dc29/public_map I'm trying to find the distance of the points to the polygon. If the points are ...
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0answers
27 views

How to obtain an euclidean distance raster from a vector file in QGIS?

I'm trying to obtain a raster of Euclidean Distances from a vector layer I have of a river in Spain. I did it very easily with ArcMap using Euclidean Distance, but I don't know how to do it in QGIS. ...
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1answer
40 views

Calculating Distance and Time on a network without the use of ArcGIS Network Analyst

I'm trying to calculate a distance and time for walking commuters (about 30,000 records) on a street network (NYC Lion). I have a starting and ending address for each record that have been geocoded. ...
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1answer
45 views

How to measure distance between two coordinate pairs taken from NMEA file?

In order to measure momentary speed, first I need to measure the distance between two pairs of coordinates. That's where my lack of knowledge stops me. I have example data in NMEA format: ...
4
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1answer
50 views

How to find the distance from a point to a polygon, via another point, in R

I am trying to calculate the distances between a central point, and the edge of a polygon, along straight lines drawn between the central point and another set of points (where necessary extended ...
2
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0answers
24 views

QGIS: distance matrix different outputs

In one of my plugins I would like to use the distance geoprocessing algorithm. When running this algorithm from the menu Vector->Analysis Tools->Distance Matrix I get a different output than running ...
0
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1answer
34 views

Calculate distance between two coordinates along lines

I have a map with two layers: a map of the streets of Montevideo, and a map of shops with the lat long location. I would like to calculate the distance between each shop and the nearest one, along the ...
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1answer
75 views

Problem with distance in QGIS

I start a new project with base on OpenLayers plugin but if I check the distance on QGIS with distance tool (I choose a straight road) I view 5.466m on QGIS and 4.300m on google (by walking). How is ...
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1answer
31 views

Distance regression in ArcGIS

I have layer of point data of aid projects in Tanzania between 2000 and 2012, and a layer of point data for 42 villages where a survey was conducted in 2003, 2006,2009, and 2013. Within the survey ...
2
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1answer
53 views

How to draw contour lines with exact distance?

I am not a professional GIS user so am desperately trying to draw contours with exact distances around my samples (points). I have 67 samples and I would like to draw contours around these points. ...
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1answer
30 views

Search radius for some intermediate distance

ArcMap on my laptop runs very slowly. So it can take a long time for a near table to run. Is it possible to use a search radius for some intermediate distance? For example, the search radius only ...
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0answers
27 views

Calculating the distance between a set of UTM coordinates [duplicate]

I would like to calculate the distance between several GPS points, these data are projected into UTM Zone 30. I am using Postgresql 9.3 but I am happy to see results with any software or website such ...
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1answer
42 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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0answers
23 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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1answer
60 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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0answers
11 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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0answers
34 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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1answer
85 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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1answer
56 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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0answers
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 ...
2
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2answers
68 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- ...
2
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1answer
37 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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1answer
74 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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0answers
51 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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0answers
134 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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1answer
124 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 ...
1
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1answer
76 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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0answers
41 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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0answers
40 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 ...
1
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1answer
38 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 ...
0
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1answer
67 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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0answers
25 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 ...
3
votes
3answers
169 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 ...
1
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1answer
56 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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0answers
26 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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0answers
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 ...
0
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3answers
115 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 ...
0
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0answers
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 ...
1
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1answer
83 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
30 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 ...
2
votes
2answers
60 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 ...
0
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0answers
48 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 ...
4
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2answers
129 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 ...
1
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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 ...
1
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1answer
58 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, ...