Questions tagged [least-cost]
The least-cost tag has no usage guidance.
39
questions
0
votes
0
answers
27
views
How to retain unique ID in QGIS while running Least Cost Distance?
I have to find the least cost distance from Junnar (19.209280, 73.872589) to a list of 207 points using the Least Cost plugin on QGIS (https://plugins.qgis.org/plugins/leastcostpath/).
My raster is ...
- 1
0
votes
0
answers
36
views
QGIS Least Cost Path Analysis taking forever
I have been trying to calculate the Least Cost Path (LCP) between two points on my map. These points are approximately 100km apart. I have created a slope from my DEM raster, created proper vector ...
- 1
1
vote
0
answers
24
views
How to get cost accumulation that does NOT take distance between cells into account?
I have performed a cost analysis on a raster, more specifically to obtain a cost accumulation raster, using the tools r.cost in QGIS and cost-distance in ArcGIS Pro.
In these tools, cost between cells ...
- 11
1
vote
0
answers
57
views
QGIS equivalent to ArcGIS "corridor" tool for Least Cost Path analysis [duplicate]
I am working on solving a task in QGIS that is supposed to be solved in ArcGIS Pro (the examples given here are modified to not show the actual solution of the official task). Cost surfaces given as a ...
- 1,235
5
votes
1
answer
171
views
Least cost path: what does least cost value represent, based on slope raster layer
Context and question
I have a raster layer with slopes in percent and used the least cost path plugin in QGIS to calculate the least cost path from start to end. I try now to understand what the ...
- 67.2k
0
votes
0
answers
23
views
Least Cost Path Pluging - points ID
I am using the Least Cost Path Plugin (https://plugins.qgis.org/plugins/leastcostpath/), which works perfectly. The "id" produced in the "output least cost path" layer takes a ...
0
votes
0
answers
17
views
Incorporate ocean crossing cost to mobility model in ArcGIS Pro
When making a cost distance map in ArcGIS Pro, how does one make the value of oceans high, and as a result harder to cross than the land?
I am making a map of movement from sites in Europe such as ...
1
vote
0
answers
33
views
How to model the fastest gain of contiguous area above a certain value? [closed]
Imagine you have a grid of squares with values 1 to 10.
Some squares are "available", and some are "unavailable", and must be "gained".
Each step you can only gain ...
- 465
1
vote
0
answers
87
views
Around the world cost distance analysis for shipping routes: routing on the other side of the planet
For cartographic purposes I'd like to calculate routes of cargo-vessels from selected ports around the globe.
The approach I wanted to take was:
Create global cost raster, where land is impassable (...
- 187
2
votes
0
answers
36
views
Including distance in the least cost path analysis in QGIS
I'd like to get the least cost path between two points. Currently I include slope as a cost layer.
However, I want QGIS to also consider distance. In this case, it could sacrifice the slope in order ...
- 49
1
vote
0
answers
21
views
Assessing match of least cost path with realized path using
I have a client who is using least cost path analysis to find paths between locations(brown points). He also has the realized, mapped paths between the same points.
For instance, say the black lines ...
- 141
1
vote
0
answers
148
views
Change the resolution of the friction surface raster and compute cumulative travel time in R
I have downloaded the 2015 friction surface from the Malaria Atlas project website (see bottom of the page). On their websites, authors specify that the measure units of such a raster are minutes to ...
- 113
1
vote
1
answer
182
views
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 ...
- 1,536
0
votes
0
answers
24
views
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" ...
1
vote
0
answers
47
views
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&...
- 11
0
votes
0
answers
29
views
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 ...
- 65
0
votes
0
answers
73
views
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 ...
- 105
0
votes
0
answers
44
views
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 ...
- 65
1
vote
0
answers
84
views
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 ...
- 11
0
votes
0
answers
167
views
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 ...
1
vote
0
answers
72
views
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 ...
- 113
3
votes
1
answer
813
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 ...
- 89
1
vote
1
answer
304
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 ...
2
votes
1
answer
133
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 ...
- 41
1
vote
0
answers
112
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" ...
- 71
0
votes
1
answer
146
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 ...
- 113
0
votes
1
answer
48
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 ...
0
votes
0
answers
334
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 ...
1
vote
1
answer
681
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 ...
- 304
0
votes
0
answers
99
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 ...
- 1
3
votes
2
answers
887
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 ...
- 263
0
votes
0
answers
57
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 ...
1
vote
0
answers
378
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 ...
- 31
0
votes
2
answers
241
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
0
votes
0
answers
130
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 ...
- 304
1
vote
2
answers
400
views
Finding Least Cost Corridor in QGIS?
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
- 373
7
votes
2
answers
1k
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 ...
- 503
2
votes
0
answers
638
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 ...
- 1,536
4
votes
1
answer
7k
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, ...
- 79