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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22 views
Service areas based on time to travel raster layer in ArcGIS
I have a series of raster layers which contain values for the time to travel (in minutes by motor) to a series of health facilities. I also have the GPS coordinates of each of the healthcare ...
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19 views
RAM overflow with new Distance tools: Optimal Path as Line
I have set up a workflow for least-cost path analysis using the legacy Distance tools of the Spatial Analyst. Trying to convert this into the new toolsets now, the new tool Distance Accumulation ...
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28 views
A QGIS tool to perform cost surface analysis (as in ArcMap Path Distance)? not a least cost path nor a network analysis? [duplicate]
Within QGIS I am trying to perform a surface analysis to show the part of the terrain that can be reached from one or more source points in let's say 1, 2 and 3 hours of walk on the ground. That is to ...
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36 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 ...
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1answer
87 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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25 views
QGIS LCP execution fails
I am trying to compute a LCP in QGIS, and it's throwing an error. I'm running QGIS 3.14 on an Ubuntu 20.04 Amazon-EC2 server (with Python 3.7.3 installed), the algorithm is from the LCP plugin in the ...
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26 views
Least cost path
I'm assuming (perhaps wrongly) that the least cost path analysis in QGIS uses a number of steps out from the active cell in calculating the best route. If so, is there a way to increase the forward ...
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33 views
How to calculate a service area of a facility, while using multiple co-variables?
Problem we would like to solve is finding out what methods are to calculate the most efficient routes in a map with distance/travel time, pop density and facility capacity as co-variables! Perhaps ...
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42 views
Trying to use the Least Cost Path plug in in QGIS
I am trying to calculate the least cost path among one central point (start point layer) and another layer made of several points, representing other sites (end-point(s) layers). I am using the Least ...
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24 views
r.walk issues in GRASS
I have been doing the r.walk analysis but fail to generate the result. The movement direction map and walking cost map from stop points is extremely small, limited to a 3x3 or 5x5 square. Does anyone ...
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46 views
QGIS plugins for creating circular route on footpath network
I'm looking for a way to create random circular walks of a specified distance from a given point. The end result will be similar to https://routeshuffle.com/ and http://www.routeloops.com/, but along ...
1
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1answer
59 views
Create polygon of fixed area based on cost/friction surface [closed]
I am using ArcGIS Desktop 10.4 and have all extensions. I have a shapefile of 494 points. I also have a cost surface/friction surface raster. I want to create a polygon of 13.4 hectares around each ...
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2answers
32 views
Looking for land value data for anywhere in North America especially for Florida [closed]
I am researching on road alignment optimization. The research goal is to find least cost road alignment between two given points, considering highway codes. One of major costs which I need to consider,...
0
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1answer
153 views
Transition Function Inputs [closed]
I would like to define my own gdistance::transition function. However, there are two issues that I aren't clear to me yet.
First, I do not yet understand what the input vector to this transition() ...
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58 views
Least Cost Path: interpretation of results
I am using QGIS 3.10.2-A Coruña and its built-in Python Console. I am currently trying to compute least cost paths between combinations of 2 points given a road network layer. For this I am using ...
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1answer
44 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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0answers
67 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" ...
0
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1answer
33 views
Calculate cost of predefined path
I am trying to calculate the cost of walking a predefined path. The path can be a line or a number of points along that line. I have a DEM and derived it's slope, which I will use as a friction map. I ...
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27 views
QGIS Least cost additional constraints
I am looking to create a least cost path for a pipe line based on a landslide risk map. I was wondering if a least cost analysis has the possibility to put additional constraints on the pathing i.e 90°...
0
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1answer
62 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 ...
1
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1answer
457 views
sf polygon to raster workflow to calculate least cost distance with gdistance in R
I need to calclulate the shortest distance from a set of points to other sets of points in a marine area. Travelling on land must not be possible so I understand I need to calculate the least cost ...
0
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1answer
32 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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0answers
27 views
Reclassify slope raster
I want to reclassify a slope raster as part of Least Cost Path Analysis, but I'm a little bit confused about the reclass rules.
My rules look like this at the moment (numbers left are degree):
0 ...
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92 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 ...
2
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1answer
593 views
Least Cost Path Analysis in QGIS?
For my Bachelor's thesis I try to reconstruct a road betweeen two ancient cities.
One method I'd like to try is least cost path analysis with QGIS. I've worked with QGIS before, but mostly only ...
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0answers
57 views
Average width of a a zone [duplicate]
How can I get the average width of a region or inside a curve?
or
How can I calculate minimum,maximum, and average width of an irregular polygon?
I have attached a figure, I want to know
how can I ...
0
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1answer
68 views
Which layer for least cost analysis?
I'm new to least cost analysis. I have a DEM-layer of a region and I want to know what's the least cost path from a to b. Do I have to use the DEM layer to calculate that? I also have a hillshade ...
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1answer
90 views
Which layer for least cost path analysis
New QGIS user here, so maybe it's kind of a stupid question. I want to calcualte the least cost path between two points but I don't know which layer to use. I have two layers, one is a hillshade layer ...
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0answers
49 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 ...
2
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2answers
282 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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0answers
36 views
How to add additional weight to shortest path?
I am calculating shortest bath between two points. I need to add an additional feature eg. air toxicity in my calculation, so that the shortest path calculated takes into account the air toxicity and ...
0
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1answer
35 views
Merging layers in cost distance analysis to account for other variables?
For example, say I was rafting down a river but there was a small bridge in the way. That would significantly change the difficulty but not necessarily stop the progress.
Is there a way for me to ...
0
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1answer
28 views
How to take number of states crossed into consideration while calculating the least cost path between two cities?
I want to create the least cost path between two cities. I have a cost raster that I can use to create a cost path between two cities. However, a new condition is that the path also should take into ...
2
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2answers
244 views
Calculate cell distance between cells
I want to calculate the cell distances between all cells within a feature class grid. Exactly the same as the game Minesweeper. I have included an example below. The original data contains 11000 cells ...
0
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1answer
115 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 ...
2
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0answers
51 views
Least cost path from visibility
I use ArcGIS 10.1 and I am dealing with viewshed and least cost path analysis. I would like to generate a path on the basis of a cost surface taking into account the viewshed data as indicated in the ...
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0answers
64 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
184 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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1answer
49 views
Blocking areas from consideration when running r.drain to calculate walking path from cost map?
r.drain was obviously originally intended to be used for drainage catchment, which is a problem when trying to find a least-cost walking path, as r.drain is happy to send you walking down a riverbed.
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1answer
906 views
Finding shortest path without barriers using the sf package in R
Say I have three ships near PNG in the pacific. I want to know the shortest path between all three, while not going aground. This can be done with the ArcGIS function "cost distance" and "shortest ...
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0answers
78 views
Using Path Distance to Calculate Total Accumulated Cost from Source to Destination?
I am looking to calculate the total accumulated cost associated with traveling from a source point to a destination point (please see the included figure below, green dot = source, red dot = ...
2
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1answer
92 views
Whitebox's cost distance tool stuck in endlesss loop
Cost distance function from WhiteboxTools (v.0.11.0) gets stuck in an endless loop after execution. The inputs are 8-bit unsigned interger GeoTIFFs. The source raster has values 1 and Null (size: 16 ...
6
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1answer
599 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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2answers
167 views
Finding least cost path to diffuse resource using ArcGIS Pro?
I am trying to solve a variant of the least cost path analysis problem (http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/creating-the-least-cost-path.htm) where instead of finding the ...
0
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2answers
60 views
Performing COST PATH in ArcMap?
I have a tiff raster dataset serving as cost raster, created a start point and destination point serving as feature source data for performing COST PATH in ArcMap 10.4.
Since the tiff raster layer ...
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0answers
75 views
More than one iteration least cost paths from everywhere to everywhere in ArcGIS Desktop?
I am working on a project with a colleague and we are looking for a way to automate the whole process of generating least cost paths from everywhere to everywhere in ArcGIS' ModelBuilder.
We have a ...
3
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2answers
324 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 ...
0
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1answer
127 views
Executing CostDistance Function in ArcPy gives Error 999999?
I am attempting to create a least cost path using ArcPy for automation. I have the starting/end points and cost surface raster already assembled, so I am just using ArcPy to automate through my ...
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0answers
30 views
Cost back link tool
I am trying to use cost path analysis to create a least cost path from ports around the UK to various offshore locations. To do this I have created a cost raster grid with values of 0 for land and 1 ...
1
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1answer
104 views
Using iterator in a cost distance analysis model with multiple destinations
I am building a cost distance model to find three different paths. Each has his own start and end point. So there are three start points with each an end point belonging to it. I want to use an ...
