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Working in GIS/ArcGIS with hydrological applications, using Python among other things.


Jun
18
awarded  Notable Question
Jun
17
comment Export to CAD from Arcgis while preserving the symbology
I'm not sure, but if it can be done it'll probably be in FME. I know there are ways to add styles to a dwg (more or less manually), but not if you can read them from ArcMap.
Jun
15
comment Hydrology Analysis via SAGA - what is the unit?
It's been some time since I worked with SAGA, but here's a few thoughts to keep the discussion going: I would assume the units are the same as in (the coordinate system of) your input data. TWI, being an index based on logarithms, is probably unitless. Strahler is usually integers, have you checked if the data includes values with decimals or just the legend?
Jun
8
comment Deleting polygon defined area from raster layer in ArcGIS for Desktop?
You should either use Erase, or create a polygon that covers what you want to keep (not what to remove) and then use Extract by mask.
Jun
7
awarded  Notable Question
Jun
5
comment how to produce a RASTER representing X coordinates
You should add that as an actual answer and accept it (when it's allowed)!
Jun
5
comment how to produce a RASTER representing X coordinates
That's because the script is made for ArcGIS 9.3, which i assume you don't use (from the tags). It'll require a rewrite before you can use it in 10.1.
May
29
awarded  Popular Question
May
25
reviewed Approve Apply css styles to layers in openlayers3
May
25
answered Is it possible to add text and numbers into the same column/field of attributes of a shapefile in ArcGIS 10.3?
May
22
comment Is it possible to add text and numbers into the same column/field of attributes of a shapefile in ArcGIS 10.3?
Yes, just use a text (string) type field. (This has more to do with the limitations of a shapefile than your version of Arcmap, although it is appreciated that you include software version :) )
May
20
comment How to create 10m DEM from 30m DEM?
It is possible the same way you create a novel from two pages of text - by adding between the lines. Since you are essentially adding data, you'd have to "manufacture" it somehow. While not very complicated technically, you are creating an illusion of more detailed data than you actually have. What is your reasoning of wanting a 10 m DEM instead of 30m?
May
11
comment Convert code VB to Python
Depending on where you are entering this expression (i.e. Field calculator and other) you need to enclose your field names with ! instead of [] for use with Python. Also, be sure to handle the case where !Field_1! == !Field_2!. +1 for the links!
May
11
comment Interpolating points conditionally
@MatthewFriedman You'd need to add selection by date to the list before making the feature layer. Millions of data points could be an issue, but depends on many things. However, extract some as test data (in the hundreds) to make sure your method works. You might also need to split your data in smaller portions before running the final calculations. This is a process that can be performed with either Modelbuilder or Python. If you have no programming experience I'd go with Modelbuilder, otherwise I think you'll have more control in Python.
May
7
comment Why does ArcMap show quantities for values that are not in attribute table?
Have you tried restarting Arcmap and do it all over again? Also, what if you look at the csv table from within Armap/catalog? It's not a decimal separator mixup?
May
4
comment Error running ArcHydro tools function in Arcmap
Hello! While this might be a part of the solution, I'd also recommend looking at the other answers if you encounter further problems.
Apr
22
awarded  Notable Question
Apr
20
comment Masking for subtype in ArcGIS for Desktop?
How about copying your vegetation layer (in TOC, not the shapefile necessarily), and then adding a definition query for paddy on it. Place above the contours.
Apr
20
comment DEM Stream Burning
With how much are you burning down your streams? A few meters? What are your high and low values in the DEM?
Apr
20
comment Using Con with Hydrology tools in ArcGis Dekstop
How about using the Stream Definition tool (from ArcHydro Tools)‌​, it seems to do exactly what you need.