Questions tagged [least-cost]

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R - gdistance: setting to 0 the conductance values of cells corresponding to a polyline

Goal I aim at setting to 0 (i.e., not traversable) the cells of a transition matrix (storing conductance values) that correspond to a (poly)line. Where I am stuck I am having hard time to figure out ...
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Singling out line features for an associated value in a given area in ArcMap

I have a series of lines that go between many points in a grid fashion, like below. Each of these lines has a value associated with it, and I want to pick out a line in each of the "square" ...
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Least Cost Grid to Connect a Start Point to End Points

I am looking for a method or plugin to find the least cost electrical grid to connect villages (end points) from a point on a existing grid (start point) in QGIS. I tried the "Least Cost Path&...
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Algorithm for least cost path used by SAGA

I have to calculate the least cost path between two points and found this tutorial: https://dges.carleton.ca/CUOSGwiki/index.php/Cost_Path_Analysis_of_Mars_using_SAGA. That's why I also want to use ...
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Limitations of geometric networks in ArcMap (Cost Calculation)

I am working with a point dataset and a street network within a geographic region. This region is divided in sub-divisions for which I want to calculate single networks within their area. Every single ...
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QGIS least cost path sum of several paths (robustness)

I use QGIS 3.16. For a wildlife conectivity model I used the plugin Least-Cost Path. For robustness of paths I used 3 different cost rasters for the same start and end points. I want to know which ...
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Accumulate values in raster cells with backlink connectivity

I have origin points in different regions and within these region also specific values within raster cells (with 50m resolution). My goal is to sum up the values of all previous cells in the ...
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Compute least-cost matrix between all pairs of destination using GRASS v.net.allpairs (QGIS)

I have a vector line shapefile showing the road network in a particular country with data on the unit cost for each line. I also have a point shapefile showing the centroids of each district in the ...
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QGIS - Least Cost Analysis - Removing waterbodies

I'm new to least cost analysis. I have a DEM-layer of a region, an I also have created slope layer. The purpose is to calculate the least cost path between to ancient sites with QGIS. However, in the ...
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Cost distance of one raster using routes of separate cost distance in ArcGIS Desktop

Is there a way, using ArcGIS Desktop, I can calculate the cost distance for one raster of cost values but instead of using the least cost distances from that raster, using the routes/paths determined ...
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2 votes
1 answer
351 views

Least Cost Path Error

I am working in QGIS and have been wanting to do a simple Least Cost Path Analysis using the SAGA tool. I have created a Slope raster for it, as well as an Accumulated Cost Surface. I have two points ...
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151 views

Habitat connectivity analysis difference between Least-Cost and Resistant Kernel Modelling

I have run a MaxEnt model on habitat suitability and transformed this into a resistance surface. I have GPS locations that I am planning on taking a random subsample from to use as termini to run a ...
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2 votes
1 answer
69 views

Calculate traveltime from a Least-Cost Path route

I'm working in least-cost paths. I used r.walk to create cost maps. I used SAGA least-cost path routine to create routes from several points to the cost-map center. Now I need to calculate the travel ...
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1 vote
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98 views

How to iterate "Cost Path as Polyline" tool using ArcPy?

I have an optimization GIS problem to be solved. I want to use genetic algorithm to solve it in Python so I have to iterate my script many times. Recently i have realized that "Cost Path as Polyline" ...
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1 answer
86 views

Calculating true distance of cost distance raster using ArcMap

I have calculated cost distance using a raster unrelated to path distance (a heat index) but would like to also measure the true path distance of those 'routes.' Is there a way to calculate such? If I ...
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34 views

Multiple least cost paths - automated labeling of the calculated paths with formula starting-point_destination-point?

I am using r.cost and r.drain to calculate a least cost path, using a single friction layer (slope), in a set of points, from each single point to the other. I would like to use the same approach on a ...
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168 views

Least cost path: single source point, multiple target points

I have a single source point in EPSG:3857, and a set of points, also in EPSG:3857. I calculated a slope layer from SRTM (in EPSG:3857) in the extent of the complete set of points. I would like to use ...
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1 vote
1 answer
393 views

Error with Least Cost Path plugin

I receive the following error when attempting to find a least cost pathway in a very large dem file (42GB). is this because the file is simply too large? If so, does anyone know the constraints for ...
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Least cost path creating unwanted straight lines

I’m very much a beginner with GIS and I’m stuck creating a least cost path. Basically, I’m trying to highlight which river valleys would most likely be flooded in the event of a volcanic eruption ...
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3 votes
2 answers
561 views

Cartographic Depth-To-Water method using Cost/Path Distance

I'm having trouble understanding the method for creating a cartographic depth to water index and seek some guidance. I'm using ArcGIS Pro 2.3, but equally happy with ArcMap desktop. The method is ...
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Making Cost Surface Distance map?

Projection is in NAD 83- units of measure in meters. I have major roads NC vector data overlaid on Forsyth county in North Carolina. I would like to create a cost surface distance map using this ...
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1 vote
0 answers
228 views

least cost path between multiple points: obtain a travelling time matrix based on cost raster

I'm new to GIS and would like to obtain a matrix with travelling times between multiple facilities. I already have a friction surface with travel times. The plugin Least Cost Path seems to be very ...
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2 answers
159 views

Cost distance tool to figure out shortest distance over water between 2 points

I have multiple points in a bay and I need to figure out the distance of each point to the nearest inlet, without going over land. I have been told to use the Cost Path or the Cost Distance tool but ...
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87 views

Slope rasters - different results from different tools

I'm calculating Least Cost Path (LCP) within QGIS 2.18. The first step is to produce the slope raster from the DEM. Using r.slope in GRASS produces excellent results where I can go on and finally ...
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2 votes
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266 views

Finding Least Cost Corridor in QGIS? [duplicate]

Does the ArcGIS Pro feature "least cost corridor" have an equivalent module or workflow in QGIS? http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/creating-a-least-cost-corridor.htm
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6 votes
1 answer
907 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 ...
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2 votes
0 answers
515 views

how to calculate cumulative cost of movement, accounting for wind direction, in R?

I am trying to reproduce the calculation of the duration of sail-powered navigation as described in an academic article (http://www.tandfonline.com/doi/full/10.1080/15230406.2017.1403376), but using R ...
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4 votes
1 answer
6k 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, ...
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