Tagged Questions

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

17 views

Extracting distances along a line from postcode a centroid to the nearest point (bus stop)

I'm looking to measure the distance from postcode centroids (point file) in a city to the nearest bus stop (point file) along the road network (line file). In Qgis I can calculate the distance but ...
3k views

Calculating distance of points along route using ArcGIS Desktop? [on hold]

I am struggling with the calculation of the distance between points along a stream (points are located 0-20m away from the stream) in ArcGIS 10. The points are simple xy-data in UTM. I created a ...
181 views

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 = ...
17 views

How can I measure the distance between many polygon features and either another polygon or a line in QGIS?

I'm fairly new to GIS and don't do a lot of complicated stuff, so please bear with me! I don't think this has been asked before, I did have a search but couldn't quite find the answer I was looking ...
521 views

How can I make a Postgres/PostGIS ST_Distance_sphere query more efficient?

Within Postgres/PostGIS I have written an SQL query to get the closest distance for each element within a point coordinate table from a polyline table. The query comes back and works correctly, but ...
78 views

Projection for Calculating Distances in Continental United States?

TL;DR Question: I want to calculate distance from point to edge of nearest polygon for 2,000 points in Continental United States. What is the best projection to use? Full Question: I have two ...
35 views

Obtaining road distances between each pair of points in point feature class using ArcGIS for Desktop?

In Calculating attribute for network distance between multiple points in ArcGIS Desktop?, an explanation has already been given how to find road distances from a certain point to each point in another ...
53 views

Copying point features along line features by predetermined distance

first post here. I searched the forum for this issue but other cases were slightly different. Anywho... I have points in a feature class. Each point has its centroid on a unique line feature in a ...
583 views

Measure average distance between two lines with common endpoints

I have two shapefiles, each with a set of lines generated from start and end points. One shapefile has the straight lines generated from the XY To Line tool, while the other has lines generated from a ...
2k views

Best formula for calculating short distances in UTM?

I'm fairly new at calculating distances with precision, but I wanted to know what is the best formula for calculating short distances in UTM coordinates. The distances that I'am calculating are all ...
195 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 ...
25 views

Find points within X distance with a specific variable

I am trying to use QGIS to find points within 5 meters of each other that all have a value of <50% for a given parameter that has been loaded through a CSV file. I looked in to doing it with a ...
26k views

Calculating Lat/Lng X miles from point

I am wanting to find a latitude and longitude point given a bearing, a distance, and a starting latitude and longitude. This appears to be the opposite of this question (Distance between lat/long ...
28 views

How to measure nearest neighbor in miles or kilometers between two point layers using QGIS?

I have tried to look for an answer to this question, but cannot find an adequate solution. I have two point layers. One is of locations by lat/longs of homes in Louisiana. The other is a layer of ...
30 views

Calculating distance to a fixed point on a map

I have a point with latitude 40.7127837 and longitude -74.00594130000002 I have imagined this point on a plane like this Latitudes run from West to East and longitudes run from North to South Can ...
416 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: ...
264 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 ...
59 views

How to use ST_DWithin to query features from one table within a distance of a specific feature or features in another table

I'm pretty new with PostGIS. I have a parcel layer and a census block layer in a postgres database, and I would like to be able to query out all census blocks within a specified distance of a specific ...
19k views

How to generate random locations nearby my location?

I am trying to create random locations nearby my location. What i want is to create random latitude/longitude pairs inside a 200 meters circle surrounding my location. This is the formula i came up ...
37 views

How to find records using a distance filter, in a table of Points?

My table fields are: POSIC (id, geom, dt_inclusion). DB is PostGIS. Data comes from a GPS Source, then i can create a route ordening the points by Date_Inclusion. So, lets say i have registries A,B,C ...
46 views

Calculate The Minimum Distance from Polygon Centroid to Edge

I am looking to calculate the minimum distance from the Center of a polygon (A crescent shaped polygon would have a center inside the polygon) to its edge. I have parcel data and I am trying to ...
10 views

OLS regression Analysis

I want to use distance to major roads for census block groups as an independent variable for my model. So I was told to do a Spatial join with census blocks groups to get a distance field, however ...
944 views

Calculating distance in WGS84 (MySQL and Geoserver)

Here is the environment in which I work: An application using geo-referenced data Database MySQL 5.5, storing georeferenced points A Geoserver server, connected to the MySQL database Here is the ...
225 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 ...
298 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 ...
949 views

Calculating distance from points to different class in raster using ArcGIS Spatial Analyst?

I am looking for some advice on how to calculate the distance from a point to a different class of a raster. Specifically, I have observations (points) of animal use overlaid on land cover data. ...
291 views

Create circles around a point on a map measuring the radius in hours

Disclaimer: I am not experienced in GIS and hope this question fits in this category. I was wondering whether it is somehow possible to create a circle* around a city, using Google Maps or the like, ...
166 views

Find point close to points from postgis table

I have a postgis point table with a large list of cities. I need to find duplicates in it, but only if they are 10km close each other, which means that is the same city. For example, I have 5 points ...
117 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).
36 views

Calculate the latitude,longitude 1000 kilometers east from a given location [closed]

I am trying to calculate what would the Google maps latitude and longitude be, for a given location, 1000 east from it. I am not looking for an application which can do, this, but rather a manual way, ...
31 views

Distance Measure using QGIS Field Calculator?

A QGIS newbie who can't for the life of them work out the expression needed to represent distance from a point. I want to show how a walkable a neighbourhood is. I need do to this by showing what ...
496 views

Calculating distance between two points on map using ITM coordinates?

How to calculate the distance between two point on the map using ITM coords? i have a map with items on it all with ITM coords and i need to return all items in X meters of radius from my location. ...
78 views

Distance between points along a polyline- ArcGIS

I'm using ArcGIS 10.3 (Desktop), and I'm trying to measure the distance between points following a path determined by a set of polylines. Hand measurement is not a viable option-- there are ~7500 ...
24 views

Distance Analysis from single point to multiple points on vector layers

Is it possible to do the following in QGIS: Create a text file that plots the distance from a single point (stored in one layer) and multiple points (stored in another layer). I have tried to use ...
40 views

Finding distance and angle to points in point buffer, from center of buffer?

I have a number of buffer circles that contains some interesting points (the green points in the picture). I would like to find out the distance and angle from each buffer center (that I have in the ...
37 views

Public transport drive times in Europe/ Germany possible with Deutsche Bahn?

Background: There are many data sources for calculating drive times for driving, walking or cycling, for example Google Maps DistanceMatrix, ESRIS WebServices (no bicycle at the moment) etc. They all ...
66 views

Find the area of a map (Xkm x Ykm) from the left & right longitude and latitude

How can the area of a map from OpenStreetMap be determined in the form of Xkm x Ykm, given the following information: Left Longitude = 103.554879 Right Longitude = 103.740497 Top Latitude ...
25 views

Can you map distance bands?

I know you can calculate using distance bands, but can you actually illustrate them on the map in ArcGIS? I have a presentation next week, and it would be a useful illustration for me to use.
36 views

Euclidean Distance Extent

I have a basemap w/ GPS points on it, and polygons of certain areas. The polygons fall well within the borders of the basemap. I am trying to generate a Euclidean Distance map of distance to these ...
24 views

How to Move points according to distance and azimuth? [duplicate]

How to Move points according to distance and azimuth ?
339 views

How to calculate the average distance among set of points as measure of closeness

I have three series (or tables) of points in PostGIS which I want to compare. I would like to know how "close" each series is when compared to the other two. In other words I would need some measure ...
81 views

How to calculate accurate distances in Openlayers 3?

I'm calculating distance in OpenLayers 3 (3.9.0). I've got a function included in my project for measuring line/area features, basically lifted from the OpenLayers Examples. I'm using ...
51 views

How to automate calculation of distance between a zip code (centroid) and an address within one line of data?

I have a large data set of federal contracts which includes two pieces of spatial data per entry (or line): the zip code in which the project took place and the address of the contractor. I am ...
21 views

Equation or approximation of short distance path on Mercator

I use osm map in my project and I want to draw shortest line between two point like this: How do they draw this path? Give me please a clue )
5k views

How to find nearest point for each point in current layer using ArcGIS Desktop?

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 ...
77 views

Measure distance between vertices of polylines in QGIS for Desktop

I have this dataset of coordinates of electric lines in the form of vector polylines as shown in the image below, and I need to measure the distance between the first and last vertex of each line and ...
110 views

Calculate nearest distance in ArcView, XY coordinates

I am really lost and struggling because I have never used an Arc system before. I have two datasets. One with house locations, and the other with investment locations- each locating by XY coordinate. ...
69 views

Find the point distance along a streams polyline?

Working in ArcGIS. I am looking for a way to find the distance of a point along a streams polyline. I read Finding distance of point along polyline? and it seems to be similar to what I need...the ...