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

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1answer
66 views

Measure shortest distance around polygon

How do I measure the shortest distance between two points (1 and 2) with respect to a polygon? So the shortest way around the polygon from 1 to 2.
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2answers
42 views

How to create for each point feature an Euclidian Distance raster in ArcGIS

I need some comment on how to create an Euclidian distance raster for a point dataset of about 100 features in ArcGIS. I need to create a raster for each single point. My question is, if there is a ...
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0answers
107 views

Google Maps Distance Matrix API - Queries per second?

I'm pretty familiar with Google's Distance Matrix API, but I'm unsure about one aspect of the Usage Limitations. The documentation states that you have access to 100 elements per query (element = ...
2
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1answer
207 views

GeoDjango, distance filter based on database column

I have a geodjango model with fields coverage = 10 * 1609.344 reference_point = Point(-72,45) #or some other lat lng class ServiceArea (geo_models.Model): center = geo_models.PointField(default=...
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1answer
33 views

Is it possible to use ArcGIS to define a boundary around a self-constructed 3D feature?

I am creating a 3D rendering of a future building and would like to know the distance from which this building would be visible from. Is it possible to use ArcGIS to define a boundary that delineates ...
3
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1answer
89 views

What is the real distance between positions?

I'm trying to figure out what gives me the most accurate distance between positions: Measuring distance directly (using Geod.inv)? Measuring distance in 2D (after transforming to a known projected ...
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1answer
65 views

GeoDjango and PostGIS distance query efficiency concerns [closed]

For example, if I want a query that says "show me all houses within 50km from here and order them from nearest to furthest", these are the questions and concerns I have: Assuming we are using EC2 (...
7
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2answers
123 views

Creating a point on edge of closest polygon

My project is looking at a grid in the ocean. I want to capture each ocean point's distance to the nearest coastline as a weight, and then use buffer to capture the sum of nightlight data within a 1 ...
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0answers
84 views

Extend line to specific distance or a line

I want to extend my polyline to a given distance. How can I do this. I have attached image to clear my specification. I am using .net in ArcMap . I am also using python in the image, I want to ...
3
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1answer
128 views

Distance in meters between two geographic coordinates

I want to determine the distance in meters between two geographic coordinates. The points are: Lat (deg) Lon (deg) A: -33.3930906 -70.5452765 B: -33.3993212 -70.5468767 So if i calc the ...
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2answers
37 views

Points proximity to polygons in ArcGIS for Desktop?

I have a point feature class with 1725 records (spread out over NYC) and a polygon feature class with 13 records (also spread out over NYC). What tools or processes can I use to figure out what ...
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0answers
46 views

Select points greater than a certain distance from related points based on shared foreign key id

I have a PostGIS-enabled PostrgeSQL db, using QGIS, with data using EPSG:4326, and projected as EPSG:29903. I have a table with points with pk point_id and a table with images with fk point_id. I want ...
2
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2answers
123 views

Average value of polygons within a set distance from a point

I have two vector layers: one polygon and one point layer. The polygon layer has a value from 1 to 10. I am trying to find the average value for all polygons within or partly within a 1-mile radius of ...
4
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1answer
93 views

Buffer from Point or Polygon with Information from Raster

The intent of this work is to define a buffer around a point or polygon based on information from a raster. For instance if a polygon representing a city and the raster defines how long it takes to ...
3
votes
1answer
48 views

using a linear solver to get a “centre of gravity” of a set of points

As a programmer, if I have a linear solver available. How can I formulate the following problem as a set of constrains / decisions / goals for the linear solver? I have a matrix of say 10*10, so 100 ...
2
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2answers
95 views

ST_Distance loop

I want to create a postgresql function which calculates the distances between random points who are stored in one table. For the Table: CREATE TABLE s_1( id bigserial primary key, the_geom geometry, ...
1
vote
1answer
66 views

Create a line from an array and measure its length with PostGIS (ST_MakeLine, ST_Length)

do I understand it correctly that it is possible to create a line out of an array with the function ST_MakeLine()? I would like to create a line from several points (more than two) and then calculate ...
4
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2answers
74 views

Get the 2 points immediately before and after a given point in PostGIS

In the picture below: The given point is C, I would like to select A and B, but not Z (which is closer to C than B but it's not immediately after in the LineString). Note that C is always ON the line ...
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0answers
98 views

How to calculate multiple distances between set of points and vector grid in PostGIS?

My set contains the following input data: A set of points and a hexagonal (vector) grid. For each cell in the grid, I want to calculate the driving-distance to each point. I thought this would be a ...
4
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1answer
56 views

PostGIS point distance from polygon not 0 when on edge

I have a pretty simple problem: SELECT * FROM ST_Distance(ST_GeographyFromText('POLYGON((70 -40,70 -39,71 -39,71 -40,70 -40))'), ST_GeographyFromText('POINT(70.48 -39)'), False) returns 118....
3
votes
1answer
67 views

Divide line by length with QGIS [duplicate]

I'm a newbie using QGIS 2.12 and I'm trying to split a line in QGIS and place points every x meters. There is a tool in ArcGIS (divide by length add in). How to achieve this in QGIS?
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27 views

Measuring large distances when all layers are in decimal degrees using QGIS?

I just developed a distance matrix between various points across Canada in QGIS. The distances produced are in decimal degrees, and I would like to view them in metric. I am unsure how to do this.
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1answer
170 views

Find nearest road distance between two points for over 1000 points

I'm extremely new to QGIS and am learning the material on my own. I have two CSV files with latitudes and longitudes, one has school address information and the other has fast food restaurant ...
2
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0answers
70 views

How to calculate shortest path from points in one layer to points in another layer via roads, in QGIS

I'm a new user of QGIS (and have experience using ArcGIS but zero programming skills) and I'm looking for a way to calculate the shortest path from addresses to subway stations via a network of roads. ...
2
votes
2answers
135 views

How to calculate the distance to the nearest water source?

I have a polygon hydro layer of my study area and am trying to calculate the distance to nearest water bodies from my site. Since my site are 2km*2km grids I am not sure how to calculate it? Whether ...
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0answers
33 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 ...
2
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0answers
41 views

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

I often have to manually measure the distance between a single site and other sites around it, but obviously this can get long-winded and I feel like there must be a much more efficient way of doing ...
0
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1answer
127 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 ...
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1answer
72 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 ...
3
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2answers
131 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 ...
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0answers
42 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 ...
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0answers
93 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 ...
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1answer
64 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 ...
2
votes
1answer
195 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 ...
2
votes
1answer
67 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 ...
2
votes
1answer
177 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 ...
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0answers
17 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 ...
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0answers
73 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, ...
1
vote
1answer
91 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 ...
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2answers
652 views

Distance between points along polyline ArcGIS for Desktop?

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 ...
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0answers
54 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 ...
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0answers
61 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 ...
0
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1answer
64 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 ...
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1answer
220 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 ...
2
votes
1answer
35 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.
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1answer
197 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 ...
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1answer
51 views

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

How to Move points according to distance and azimuth ?
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1answer
648 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 ...
2
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0answers
164 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 ...
3
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1answer
45 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 )