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Jul
16
comment Spatial join with HUGE datasets
@Vince, you are of course correct about that. This was originally designed for a somewhat different purpose. However, it shouldn't require too extensive changes to query the line layer instead of the polygon layer.
Jul
16
answered Spatial join with HUGE datasets
Jul
16
reviewed Approve How to install mapserver on Windows/Apache?
Jul
16
comment Spatial join with HUGE datasets
There must exist more efficient ways than a spatial join if your only target is to find out the amount of lines in each square? I'd do it with a Python script that clips the lines for each polygon (iterate over all polygons), count the lines that are left and write to the attribute table. Optionally create output files every few ten thousand polygons or so, just to be sure. That would also allow for batch processing more easily.
Jul
16
comment choice of number of neighbors in IDW
Then I'd suggest you try with a few different values and see what you get. You can also try with Krieging and Topo to Raster if you want alternative methods to compare with
Jul
16
comment choice of number of neighbors in IDW
@david_p, please include the above comment as an edit in your answer. NewAtGis, maybe you can post a screenshot (with scalebar or similar) of your data so we can have an actual case to discuss?
Jul
16
comment choice of number of neighbors in IDW
I believe the question was how to decide the amount of neighbours with mathematical reasoning (@NewAtGis, correct me here if I'm wrong), not where to enter the value in the GUI. Maybe you can elaborate on your answer to include that too?
Jul
16
comment ArcMap data links redirecting to location of exported map
Since you have relative paths, you don't somehow move/resave the mxd to the output (Maps) folder? It was just a thought that came to mind...
Jul
15
reviewed Approve How to find and replace attribute values based on a list
Jul
8
comment ArcGIS 10.1 Archydrotools watersheed delineation AdjointCatchment error
How many catchments would that create? I'm guessing in the tens of millions, at least. However, the adjoint catchments won't change if you have a slightly higher stream threshold, say 20 000-50 000 cells. That is likely to reduce memory requirements without changing the output (for Adjoint catchments, that is). Also, do you really need that detailed catchments? I occasionally create catchments on block level (2-4 small houses), but can't recall ever using a value in the hundreds.
Jul
6
comment Create a Loop for Arcpy
Maybe you should validate the VB expression somehow? Or help the user by only having to specify column and new value in separate prompts, and then build the expression in the script?
Jul
6
comment Reducing cell size of DEM for processing reasons?
While that does sound tideous, you then have to evaluate which will take most time from you versus how fast you need the results. Possibly you can automate the process of merging rasters as well.
Jul
6
comment Reducing cell size of DEM for processing reasons?
If you have several cores on your computer you should split your raster in parts. Take the amount of cores minus one or two (check in Task Manager --> Performance how many you have). Then you can run those parts in separate processes. From what I understand ArcMap can only use one core for each process, and this method will let you use more of available resources without (significantly) slowing down your computer. I guess available RAM also matters, though.
Jul
3
comment Setting PDF page numbers/names when created by Export Map enabled with Data Driven Pages?
But I doubt you can change the page numbering circeld to the left in your image, and is nothing that ArcMap can have any influence on. That is a property of the pdf document and/or the pdf viewer, and I have a hard time seeing any reasonable way to change how they are displayed.
Jul
3
comment Setting PDF page numbers/names when created by Export Map enabled with Data Driven Pages?
You can add any feature-based information to your layout, provided it exists in the feature class that drives your data driven pages. It is available in the menu to the right in the DDP toolbar.
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