37,792 reputation
987162
bio website quantdec.com
location Northeastern US
age 14
visits member for 3 years, 11 months
seen 23 mins ago

Consultant (environmental and spatial stats a specialty), expert witness, and teacher. I can be reached through (outdated but still valid) links posted on my web site.

Twitter: @WilliamAHuber // ASA-P website: http://amstatphilly.org/


Why waste time learning, when ignorance is instantaneous?

--T(iger) Hobbes.

For any complex problem there is a simple solution. And it's always wrong.

--[Mis?]attributed to H.L. Mencken by Dava Sobel, Longitude.


11m
reviewed Leave Open How to optimise and speed up Python code?
12m
comment How to optimise and speed up Python code?
Something is the matter with the procedure used to compute the flow lines if it allows them to cross. Why not use a better procedure at the outset and avoid this post-processing altogether?
13m
reviewed Looks OK Use Values from Raster Statistics (e.g. sum of all cells) in Raster Calculator
14m
answered Use Values from Raster Statistics (e.g. sum of all cells) in Raster Calculator
20m
comment Use Values from Raster Statistics (e.g. sum of all cells) in Raster Calculator
This is a good solution when the raster actually has a VAT ( which occurs only when it has integral values) and when a value is not needed "directly inside a raster calculator," as requested in this thread.
22h
comment Is there a difference between the Planchon & Darboux and Wang and Liu depression filling algorithms? Other than speed?
+1 It is a pleasure to read an informative, thoughtful, knowledgeable answer like this one.
1d
reviewed Reopen Field calculator fails when computing First X coordinate in ArcGIS10
1d
reviewed Reopen Save Multiple Selection from Attribute Table
1d
reviewed Leave Open Calculating travel time from residential points to stores via public transit using ArcGIS for Desktop?
1d
reviewed Close Field calculator fails when computing First X coordinate in ArcGIS10
1d
reviewed Leave Open Serving data based on tiles
1d
comment Calculating real surface area using Zonal Statistics as Table Tool?
Zonal statistics of the slope will not compute the surface area: you need to compute the zonal sum or zonal mean of the secant of the slope. See the followup thread for details.
1d
revised How can I use regex in the AttributeCreator Advanced Editor in FME 2014?
edited tags
1d
revised What is the best conversion tools?
edited tags
1d
reviewed Leave Open Will QGIS fulfill my requirements? moveable, rotatable, draggable, complex, interactive icons
1d
reviewed Leave Open Error 000732 - input raster does not exist when implementing script tool arcpy
1d
reviewed Close Save Multiple Selection from Attribute Table
1d
comment Aggregate the raster from the Combine Tool in Spatial Analyst--->Local
+1 This is the right solution.
1d
comment Read large raster into lat/lon value pair to csv file using python and/or gdal?
Could you enlighten us as to why you would want to do this? Since the land area of the US is about 10^13 square meters and each line of this CSV file would need about 20 characters on average, the resulting file would have almost 10^11 lines and 2*10^12 bytes (two terabytes). This would be unwieldy, to put it mildly. High-precision alternative forms of maintaining this information could occupy as few as 24 bytes (coordinates of grid origin and cellsize, all in double precision), which is ridiculously more efficient. What is it about your application that precludes such simple solutions?
1d
revised Is there a difference between the Planchon & Darboux and Wang and Liu depression filling algorithms? Other than speed?
added 208 characters in body