1

I am trying to convert a slope raster to a friction surface with values based on Tobler's Hiking Function in ArcGIS Pro, but I get an error message I am not sure is about the formula syntax or file/path names. I first converted a DEM of part of the Florida coast with a 5-meter cell size and elevation units in centimeters to a slope raster with a Z-factor of 0.01 because I believe I had to convert centimeters (vertical units) to meters (horizontal units). When the Z-factor was 1 most of the land, including the coastline, had values greater than 45 degrees. Other than roads and reservoirs the slope raster is very flat but I would expect that for Florida.

Error:
 ERROR 000539: Traceback (most recent call last):
  File "<expression>", line 1, in <module>
  File "<string>", line 8, in rcexec_DC684390_0C54_4F14_9EBF_B34DF3F2E1B1
RuntimeError:  ERROR 010240: Could not save raster dataset to cm5_fl7_hike.tif with output format FGDBR.
 Failed to execute (RasterCalculator).

Parameters:

Map algebra expression:  (5.0 / 1000) / (6 * Exp(-3.5 * Abs(Tan(("DEMs\5M\cm5_fl7_slopem.tif" * 3.14159) / 180) + .05))) 

Output raster: d:\FLGIS\Lidar\Lidar.gdb\cm5_fl7_hike.tif

I am trying to replicate the following mathematical formula which was typed exactly as it was written in an article guideenter image description here

Improve this question
3
  • 1
    You can't have an extension on a file geodatabase raster. It's either TIFF in a folder with an extension or a geodatabase raster without an extension.
    – Michael Stimson
    Commented Oct 7, 2020 at 6:00
  • It's wrong to use formula like that, because slope can be both positive and negative, read on vertical factor. E.g. gis.stackexchange.com/questions/190144/…
    – FelixIP
    Commented Oct 7, 2020 at 6:26
  • Can I change the RC formula or should I use another tool? After trying to replicate the PDBL in your link I get nine "Error: Initialization failure in distributed distance operation." Does it have to do with using 21 points for my feature source data?
    – qu4ntumrush
    Commented Oct 8, 2020 at 0:25

1 Answer 1

Reset to default
3

When creating raster data in geodatabase, you do not need to add file extension such as .tif. This a mentioned in the help of Create Raster Dataset:

When storing a raster dataset in a geodatabase, do not add a file extension to the name of the raster dataset.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.