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Questions tagged [least-cost]

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46 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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0answers
26 views

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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2answers
54 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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34 views

How to calculate / determine travel *time* within a cost-distance model?

Here's my problem: I have a network of trails between locations scattered across the eastern US (think hiking trails, on foot, not vehicular travel). I would like to calculate on-foot travel time (...
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0answers
16 views

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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0answers
37 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 ...
0
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1answer
65 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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0answers
56 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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0answers
91 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
6
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1answer
269 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 ...
2
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0answers
352 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 ...
3
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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, ...