Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [cost-surface]

The tag has no usage guidance.

0
votes
0answers
14 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 ...
0
votes
0answers
19 views

Running Cost Paths with Overlapping Points?

I am running cost paths on a data set with 60k points which represent farms. About a third of these points have the exact same coordinate (points can often represent village centers where the farm ...
1
vote
2answers
54 views

Cost raster/friction map and data extraction

I am in an early stage of least cost paths analysis of a wide area. One part of the operation includes simulation of movement across the grid of previously agreed size of cells and extent of the grid (...
0
votes
1answer
41 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 ...
1
vote
1answer
35 views

QGIS r.walk.points Movement Directions raster exeeds input raster

I am very new to GIS, so excuse my potentially poor terminology. I am trying to create a cost surface in qgis. I have an raster with elevation data. Based on that I created a slope with the DEM ...
0
votes
0answers
60 views

Implementing travel cost equation in Google Earth Engine with image math?

As a follow up to How can I estimate a Least Cost Path in Google Earth Engine?, I am still trying to estimate walking time in Google Earth Engine based on a slope-based cost equation using the ...
6
votes
1answer
166 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 ...
0
votes
0answers
33 views

Specifying width of least-cost path in ArcGIS Spatial Analyst?

I am performing a least-cost path analysis using ArcMap in an area with high slope variation. I am working with a 0.5x0.5m raster to prevent generalization and elimination of danger slopes. I need a ...
2
votes
2answers
128 views

Tobler's hiking function: resulting walking speed in KmH or m/s?

I was reading some literature dealing with least-cost path calculation and accumulate cost-surface generation using the Tobler's hiking function. I was reading this literature since I am trying to ...
1
vote
0answers
60 views

Integrating use of surface distance when calculating cumulative cost-surface based on walking pace?

Disclaimer This question is somewhat related to a number of earlier questions of mine: Accumulated cost surface (Tobler's hiking function) ignoring slope using R gdistance?; Calculating ...
1
vote
0answers
27 views

Assure the continuation of rivers (raster dataset)

I am creating a cost surface raster for identifying least cost paths for road constructions. One of the factors influencing the cost is water cover. I am using Landsat based Global Surface Water ...
7
votes
1answer
400 views

Understanding the values from transition layers produced by the R package `gdistance`

Background and Aim I would like to create a cumulative raster representing walking time across a surface. For my purposes, the cost to be accumulated has to be the walking time as influenced by ...
2
votes
0answers
133 views

Working out travel time from gdistance's conductance values in R?

Introduction This question is indirectly related to a previous post of mine (Calculating accumulated walking pace from starting location outwards using R?), but asks guidance about a different aspect,...
4
votes
1answer
85 views

Calculating accumulated walking pace from starting location outwards using R?

Goal In R, I would like to calculate an accumulated cost surface around a starting location, with the cost representing the time (say, hours) to walk from the location outwards in all directions (say,...
1
vote
0answers
226 views

Accumulated cost surface (Tobler's hiking function) ignoring slope using R gdistance?

Background I wish to calculate in R the isochrones moving from a location outwards, implementing the Tobler's hiking function via the gdistance package (https://cran.r-project.org/web/packages/...