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

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2
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0answers
21 views

Creating a distance overlay that is computed by the distance of points/lines and recalculated on zooming

I created a fictional map and visualized it with d3. Now I would like to show a scale/rule so that the user can see which distance (kilometers,meters) he is currently using. I was thinking about ...
0
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0answers
68 views

Calculating distances in Geographic Coordinate System using ArcGIS for Desktop?

I work in a Geographic Coordinate System and using the "Generate Near Table" tool in ArcGIS 10.2 for Desktop. I want to calculate the distances that each feature of the point layer has to the closest ...
2
votes
1answer
152 views

Geographic Heatmaps with Concentric Circles by Distance

I'm looking to generate a geographic heatmap (using 'ggmap') that overlays some dimension (to start, housing prices) over the lat/lon near a city center. Then I want to create circles of equi-distant ...
0
votes
1answer
45 views

Calculating distance between many users of a handful of facilities, a small hangup

I am trying to calculate distance between thousands of people and a handful of facilities. I know the ArcGIS ROUTENAME issue has been addressed many times in forums. I have scoured them and am hung ...
0
votes
1answer
47 views

Calculating distance between previous and current addresses for large file

Hoping to get help with this. I'm a fairly new QGIS user and trying to solve the following problem: Let's say I have a large dataset (5000+ records) of customer addresses, previous and current, and I ...
0
votes
2answers
51 views

distance between paired points in separate shapefiles (paired by attribute data)

I have a point layer with site_code attribute data. I have another layer of points in different locations but with the same site_code data. How can I find the linear distance between points that are ...
2
votes
0answers
170 views

GeoTools - Find distance in meters between point and path in lat/lon

I need to find distance in meters between some point with given latitude and longitude and line (on Earth) defined by several points with lat/lon coordinates. I read this questions: first second ...
1
vote
1answer
11 views

How to set a polyline length as per a given Image

I have an image of a map representing the road networks. I have converted these road networks into a shapefile with only polylines. I want to set a distance to this road network. For e.g I know from ...
1
vote
3answers
101 views

Computing distance from points to coastline

I have a shapefile with the nodes of a grid I have applied, for the purposes of interpolation, and I want to compute the euclidean distance that each grid node (it is a point vector) has to the ...
1
vote
0answers
43 views

QGis measure tool does not continue to measure within point symbol

We are using QGIS more and more, however, today a colleague noticed something strange when using the measure line tool. We have point features and different symbols of different sizes and colors are ...
1
vote
0answers
198 views

Finding and selecting locations in database near 10 km distance from path

In the Google Maps API, I have this Javascript. It is finding and showing user the shorter path between two cities. <!--////// \\\\\\\--> <style> #panel { position: ...
0
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0answers
74 views

How to choose data type and SRID, for coordinates from different sources, in a medium size zone

I'm developing an application. In the database I need to store coordinates for many places, in the north-east of Italy, but the area could expand in the future. This coordinates will come from some ...
1
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0answers
126 views

Trilateration using 3 x,y points and 3 distances, all in cm [closed]

I want to find out the position (x,y) of a given point, knowing the distance from 3 x,y points. Below you can view the x,y coordinates and their given distances in cm. B1x = 795 B1y = 332 B1d = ...
0
votes
0answers
30 views

Get latlong at a distance on a path

I have 2 decimal point in lat/lon. I want to divide the line drawn by lat/lon into parts each at a specified distance, lets say 'x' -- all except the last segment will be of length x -- and I need the ...
2
votes
1answer
68 views

am I setting up data from google geocoding correctly for ST_DWithin search?

Sorry to ask a basic question, but I have not been able to find this laid out entirely anywhere. I am mostly relying on this SO post: What Spatial Reference System do I store Google Map's Lat/Lng ...
1
vote
1answer
175 views

postgis calculate distance between point & polygon/circle

By basic requirement is to find the nearby fences to a particular point(user lat long alt) within a N meters. I have list of polygon/circle in DB with 900913 srid ...
1
vote
0answers
45 views

Using the accCost() function in R: questions regarding the transition layer

I am trying to use the accCost() function from the gdistance package in R. I load my cost raster using the raster()function from the raster package. According to the documentation, I need first to ...
1
vote
1answer
128 views

How to convert distance in meters(EPSG:28406) to EPSG:900913 with OpenLayers?

For point I use OpenLayers and transform(): numZona = Math.ceil(parseFloat(lon)/6)); Proj4js.defs["EPSG:28406"] = '+proj=tmerc +lat_0=0 +lon_0='(parseInt(numZona)*6-3)+' +k=1.000000 ...
2
votes
0answers
119 views

Calculate Euclidean distance to raster WITHIN multiple polygons

I am using ArcGIS 10.1 on a Windows x64 system. I am working in a study area where I have 360 000 locations of about 50 territorial animals. I have a shapefile containing 125 sometimes overlapping ...
1
vote
1answer
46 views

A bit of help using Google maps

I have 1000 or so points on a map, (I have GPS coordinates. I would like to use google maps to find the shortest distance using roads, between pairs of points. I would like to measure all pairs within ...
0
votes
0answers
126 views

Trilateration Calculation Issue

edit I was able to do this following partially from this solution: How to calculate the intersection of 2 Circles? I broke it up into 3 groups of intersections AB, AC and BC. Once I had those I took ...
2
votes
1answer
160 views

geotools Linestring distance in meters

I want to use geotools for working with gis data. I'm most concerned about distance calculations, not so much about drawing a map. What I still couldn't figure out is how to make distance calculations ...
2
votes
1answer
90 views

GeoDjango and Google Maps

I try to calculate distance between two cities and I'm in big confusion because the results are wrong. I have a model in geodjango like this: class Address(geo_models.Model): coordinates = ...
1
vote
0answers
105 views

Calculate the distances between n geographical points

First of all, I'm sorry if my question is stupid, but I'm totally new to the world of GISs and geographic measurements. I would like to calculate the distances between N (an arbitrary number, but ...
4
votes
1answer
128 views

Identifying south facing mountain land, above an elevation, within a slope range, less than fixed distance from major roadways

This odd question comes from believing that such an analysis is plausible in a GIS system. Only, I don't how to accomplish the various discrete steps implied from the Title, nor where to get a topo ...
2
votes
1answer
94 views

Distance to nearest hub output not correct

In QGIS 2.6, I'm working with two point layers: center of the population per census tract and stores that accept food stamps. I'm using "distance to nearest hub" to calculate nearest food stamp outlet ...
2
votes
2answers
151 views

QGIS equivalent for ArcMap join for purpose of distances from points to polygon?

It is relatively easy to calculate distances from points to a polygon in ArcMap by doing a join and selecting the option for creating a field containing the minimum distance information. i.e. it ...
0
votes
1answer
161 views

Distance between a Point and Linestring: PostGIS/GEOS vs. Boost

I am currently using the GEOS library through OGR and data from a PostGIS database to work with geospatial data. I now found myself in the need to use some of the algorithms Boost.Geometry and ...
1
vote
0answers
74 views

Finding census block with highest pop. value within the census tract

In QGIS, I'm trying to plot a centroid of only the census block with the highest population within each census tract. So there should only be one point per tract- that of the block with the greatest ...
2
votes
1answer
188 views

Finding and using data on population density files

I'm attempting to replicate this map for the state of Nevada in QGIS: source: http://www.bostonfed.org/commdev/c&b/2014/spring/map-distance-to-closest-snap-outlet.htm (A SNAP outlet is just a ...
2
votes
2answers
112 views

Is there an R equivalent of NEAR in ESRI ArcGIS?

I have 54 points in one data set A I have 300+ data points in a dataset B. I wish to find the distance for each point in dataset-set B, to points in dataset A. Nearest Neighbor packages appear to ...
2
votes
2answers
87 views

Calculating sum of distances between multiple points in ArcMap?

I am using ArcMap 10.2. I have two layers- one is around 2,000 geolocated ballot boxes while the other is around a dozen geolocated facilities. I would like to calculate the total distance between ...
8
votes
3answers
274 views

Calculating all distances from single points to multiple polygons

I have two layers: a point layer defining properties (95 objects), and a polygon layer defining plots of land associated with the properties (211 objects). Each point relates to one or more polygons. ...
3
votes
1answer
79 views

Create Archimedean spiral with geographic coordinates

I don't know if this is the right place to ask but here it his. I want to create an Archimedean spiral based in some location. Lets say I have this set of geographic coordinates (48.860770, ...
0
votes
1answer
60 views

How to select all polygons where neighbor vertex points are below a distance threshold in arcmap

I have a shapefile with over 100k polygons (some of them have holes in them but apart from that they are simple polygons - no multipart). I want to loop through all of these polygons and select only ...
2
votes
0answers
135 views

Get Distance between two point on linestring using mysql Spatial

I have a linestring and two point on this linestrin according to my picture i want distance between two point as base of linestring please hellp me
0
votes
2answers
65 views

Finding point on road network at specifc distance from a specific point

I have road network in a geodatabase. At a certain junction in network (Point A), I want to figure out Point B which is X kilometers away from Point A in certain direction. Summary: Point A: fixed ...
1
vote
1answer
90 views

ERROR 000989 Issue with Python Script and Field Calculating distance between two long lat points

very new to scripting and I have been struggling with my script for a while. I'm not sure why it doesn't work in field calculator. I am trying to calculate a list of distance between two long lat ...
0
votes
0answers
28 views

PostGis: find distance if closer than X. For huge sets [duplicate]

I have two tables (that can have different geometry: point, line, polygons, ecc...) and I have to find distances: for all features in table A, for all features in table B, if feature is closer ...
1
vote
1answer
39 views

Visualisation of “dominant” point in each location

I had an idea for a kind of visualisation, and I'd like to know if it's been done before, what it's called etc. Basically it would visualise a single numerical quantity that varies greatly, at ...
0
votes
0answers
28 views

Finding Cooks Distance on ArcGIS

is there a way to find Cooks distance on ArcGis or do I have to use SPSS?
1
vote
2answers
76 views

Calculate nearest feature with a barrier

I have three shapefiles: a) polyline with rivers and streams (also as polygon available to me), b) polylines of highways and roads and c) point file with locations in the riparian vegetation. I want ...
3
votes
2answers
121 views

Identifying the side of a point from the closest polyline in ArcMap 10.0

I have a set of polylines (a network of streams and rivers) with information on the left and right side of the streams on riparian structure. I also have locations (points) of either side of the ...
2
votes
1answer
80 views

Calculate Height Data From Three Known Points

What's the best way to calculate "height" (snowfall, actually) data from three surrounding locations? For this example, I'm looking to arrive at a "close enough" snowfall value at point A by ...
1
vote
1answer
51 views

Compute nearest points to other points using GRASS

I have a layer of address points and a layer of polling stations. My task is to determine the three closest polling stations to each address on the street network. I think that the answer is in ...
2
votes
2answers
117 views

Measuring distance between two points?

I have two shapefiles and I would like to know the distance between each point on File1 and each corresponding point on File2 (one to one relationship). I have been using the Ruler and manually ...
-2
votes
1answer
107 views

Cause of KeyError in Python Toolbox of ArcPy?

This question arises from Performing Point Distance analysis using Basic level license of ArcGIS for Desktop?. I basically copied and pasted PolyGeo's answer and formatted it into a python toolbox ...
1
vote
1answer
62 views

What does st_hausdorffdistance Actually Compare

Does st_hausdorffdistance just look at discreet points used to construct a line segment or does it compare two line segments as a continuous set of points? Also, the points used to construct my line ...
2
votes
1answer
52 views

Adding cost from line shapefile using ArcGIS Network Analyst?

I have a network dataset (a road network), and require a matrix of Cost Distances between many points, which works well. I have now added a line shapefile (representing rail lines). I wish to use it ...
1
vote
0answers
55 views

How can I find which point is furthest from something?

Here is an example of what I am looking to do: Which town in South Dakota is farthest from a Hospital? Which tool would I use to be able to do this?