Questions tagged [cost-path]

A raster-based ArcGIS geoprocessing tool that calculates the least-cost path from a source to a destination over a cost surface.

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8
votes
2answers
6k views

Cost Distance Analyst In QGIS?

Are there any tools, plugins or methods in QGIS which allows for an analysis of the best path between two points using least cost path method? As shown below ArcGIS has several distance tools.
16
votes
4answers
5k views

How to create an OD road distance matrix in QGIS?

I'm looking for the steps required to produce an origin-destination (OD) cost matrix. What I'm looking for is a matrix of road distances. The distance matrix tool only produces euclidian distances. ...
3
votes
2answers
2k views

Tobler's hiking function in PathDistance ArcGIS 10.3.1

I am working on least cost paths for an archaeological project and I am trying to implement Tobler’s hiking function on ArcGIS 10.3.1 for Desktop. I am using SRTM 1 arc second global downloaded on ...
2
votes
1answer
4k views

Finding Least Cost Path in QGIS?

I'm trying to work out least cost paths in QGIS. I have a DEM and a slope raster extracted from it, and a set of points, between which I want to find the least cost paths. I can find a SAGA plugin, ...
8
votes
2answers
3k views

GDAL - Perform Simple Least Cost Path Analysis

I am investigating methods to perform a simple least cost path analysis with gdal. By simple, I mean using the slope of a dem as the only cost factor. I would prefer to do using the python or .net ...
6
votes
1answer
2k views

How do I find least cost path over a DEM based on slope magnitude and direction?

What sort of algorithms can I use to find a least cost path through a DEM where it costs more to traverse a cell going downhill or uphill than it does to follow the contour of the land? All the ...
2
votes
1answer
100 views

Automated mapping of cost paths from multiple origin points

I am currently mapping Lahar flows on Montserrat Island (as many have done before!). I have the Cost Distance analysis below, the circle is the origin and the triangle the destination. With a known ...
1
vote
1answer
670 views

Road design using Least cost path by longitudinal slope in ArcGIS Desktop?

I have previously asked for help regarding this issue Finding least cost path in QGIS?, but obviously people do not know exactly the problem related to road design I used the least cost path, this ...
5
votes
2answers
2k views

Least cost path between various points QGIS

Is there an easy way to find the least cost path (LCP) between various points in an open source GIS? This question has actually already been asked here: How to find a least cost path through several ...
9
votes
3answers
2k views

Looking for a fast, open-source raster cost-distance function to use in code

I've been scouring the internet for a fast, open-source cost-distance function that I can embed inside my code. The functionality should basically work like the ArcGIS implementation where I can ...
6
votes
1answer
221 views

How can I estimate a Least Cost Path in Google Earth Engine?

I'm using Google Earth Engine to estimate walking time based on slope, using the Google tutorial and this example based on a DEM. My code actually runs, but I don't know what units the output raster ...
13
votes
1answer
372 views

Creating Buffer Polygon following Elevations using ArcGIS Desktop?

What I'm looking to do is put a 100 m buffer on a polygon, but rather than the buffer being at a fixed width "as the crow flies" I want it to follow the slopes of my Lidar DEM. I have ArcMap (with 3D ...
3
votes
2answers
742 views

Calculating distance of sites to riverways using ArcGIS Desktop?

How do you calculate the distance of about 10 sites scattered across a region to bodies of water (rivers and lakes) using ArcGIS 10.1? I have the lat/lon coordinates of the 10 sites as a point ...
2
votes
1answer
284 views

C-based implementation of Djikstra's or Fast Marching for QGIS/Python?

I need an algorithm to find least cost paths between points on a discrete grid, allowing for the direction of transport to affect the cost of transport, allowing for different modes of ...
1
vote
1answer
455 views

QGIS Least Cost Distance Points to Destinations via Roads

I have a layer of starting points (people's residences) and a layer of destination points (stores). I also have a roads layer with a cost field calculated from distance and speed of each segment. ...
6
votes
1answer
721 views

How to get r.drain to run in QGIS/GRASS?

I use the GRASS GIS extensions for QGIS (QGIS version 2.12.3 with GRASS 6.4) and I have a problem with the r.drain algorithm: I simply cannot make it work with a given starting point as a vector point....
3
votes
1answer
203 views

Performing least cost path analysis on QGIS using permeability scores for 60 points in network?

I have a map that is made up of polygons that apparently cover the whole area without leaving gaps, each representing a field, a wood, a road, a house etc. Each polygon has a score in the attributes ...
3
votes
3answers
847 views

Raster map in different zone () than region ()

I am new to QGIS (just installed QGIS 2.0.1) and am having problems running any spatial analysis tools. I followed the instructions on how to call GRASS tools into QGIS, but when I try to run the r....
2
votes
1answer
149 views

ArcGIS Cost Path Analysis. How to extract the area covered by the many possible shortest paths?

As you can see in the picture ArcGIS Cost Path Analysis produces different results based on chosen direction (blue path direction: start->stop, red path direction: stop->start). As Cost Path ...
2
votes
1answer
672 views

How to find a least cost path through several points?

I want to do a least cost path analysis and the least cost path has to go through several different points instead of having just a start and end destination. Is this possible? I am using ArcGIS 10.2....
1
vote
0answers
477 views

Finding least cost path in QGIS? [closed]

There are a lot of questions for this method, but does not fit in my case. I have designed a network of roads, manually, and this is optimal. Max longitudinal grade of roads is 12%. (These are forest ...
1
vote
1answer
78 views

Which projection when dealing with least-cost path estimation across the Mediterranean area?

I am planning to perform a least-cost path analysis in ArcGIS 10.1 (advanced license) by means of Path Distance tool. I am taking into account a large area, corresponding to the Mediterranean basin. I ...
1
vote
2answers
686 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 ...
1
vote
1answer
896 views

Cost Distance Paths in Python

I have a feature dataset with 317 points (UpperPoints) and another with 394 (LowerPoints) points. Now I want to calculate the cost paths as in this example here. However there are multiple files used ...
1
vote
1answer
485 views

Cost Distance interpretation in ArcGIS 10.2

I am using the Cost Distance tool in ArcMap 10.2 to find the how far it is to walk to the closest area of green space along the road network in a town. I have a input raster of the location of the ...
0
votes
1answer
877 views

How to create a loop for multiple points with cost distance / cost path in ArcGIS 10.2 in python

I would like to know how to simplify the following code in order to execute it more efficiently than copy paste 82 processes (with a loop I guess?) but I don't know how to do it. There are 4 main ...