Timeline for Methodology for creating accurate drainage networks (and catchments) from high resolution LiDAR DEM?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Dec 21, 2015 at 13:42 | comment | added | david_p | GRASS GIS has only one disadvantage I think, and it is the special native environment for layers. It's a bit annoying for those who dont know GRASS as well. But after while, you shnoud use to it. | |
| Dec 21, 2015 at 13:38 | comment | added | david_p | I'm glad that I helped you! I like GRASS GIS for lots of hydrological analysis and for very good results that it gives. Like you said, ESRI is really outdated. I don't even know hom much outdated it is. If you want to try more hydrological analysis, check out this pages (maybe you allready have): grasswiki.osgeo.org/wiki/Hydrological_Sciences and grass.osgeo.org/grass70/manuals/topic_hydrology.html. | |
| Dec 19, 2015 at 15:00 | comment | added | Jakub Sisak GeoGraphics | Just wanted to say that this is great! Running some preliminary tests with a colleague of mine on our Lidar datasets and early results are looking very promising. Amount of features and parameters and the ability to even add some cartographic touches is great. Results are matching up with actual streams. Also finding out just how outdated the ESRI algorithms are - unchanged since the mid 80s. That explains a lot. Thank You! | |
| Dec 18, 2015 at 21:02 | vote | accept | Jakub Sisak GeoGraphics | ||
| Dec 18, 2015 at 21:02 | comment | added | Jakub Sisak GeoGraphics | Very Interesting! You are able to produce the same error I am seeing using ESRI tools. This leads me to believe that the ESRI algorithm is simply not capable to deal with high resolution data. This pretty much answers the question. Thanks for the visuals - amazing! I have next to no experience using GRASS tools for watershed/drainage analysis. I would greatly appreciate if you could point me to a basic "how-to" tutorial. | |
| Dec 16, 2015 at 9:57 | history | edited | david_p | CC BY-SA 3.0 |
added 32 characters in body
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| Dec 16, 2015 at 9:49 | history | answered | david_p | CC BY-SA 3.0 |