# Questions tagged [tobler]

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### Tobler's function in QGIS

I would like to estimate the least cost path between a source point to a group of other points. I would consider the cost as travel time by using Tobler's function in QGIS (I am new with it). What are ...
• 71
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### Tobler's hiking function on QGIS

I'm trying to apply Tobler's hiking function on QGIS using this formula: (your_res / 1000) / (6 * 2.71828 ^ (-3.5 * abs ( Tan ( ( your_slope* 3.14159)/180) + .05))) My DEM's resolution is 30m, and I ...
149 views

### Negative slope in QGIS

How do I use the QGIS slope function to calculate slope and differentiate between uphill and downhill, and produce both positive and negative slopes?
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### How to interpret Tobler’s First Law of Geography?

Waldo Tobler's First Law of Geography is an axiom in GIS which states that "everything is related to everything else, but near things are more related than distant things" (Tobler, 1969). ...
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1 vote
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### Has any research been done into navigability for offroad vehicles for different types of terrain and elevation changes? [closed]

"Navigability" is a pretty broad category, so to be specific, what I mean is, given some GIS data, how can we calculate the cost of moving from point A to point B, in some context? For ...
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### Using Tobler's Function Equation in QGIS (Creating Friction Surface)

I'm struggling to get an equation working in QGIS that I've seen posted for ArcGIS. This article has a full description. Long story short, the author modifies the original Tobler's Hiking Function for ...
139 views

### Mapping Tobler's hiking function with additional impediments using ArcGIS Desktop

Is there a way I can use Path Distance in ArcMap to calculate Tobler's Hiking Function with a DEM but also with additional time costs from non-slope impediments? For example, part of the landscape I ...
• 123
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### 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 ...
• 1,536
283 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 ...
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### 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, ...
• 1,536
1 vote