Latest Contributions by NeilAyres

What you are saying here with this statement : "Con("flood_depth_raster","dem")" Is something like IF (flood_depth_raster is not null or empty, then return the dem raster, there is no else returned). This would be more properly stated as something like : Con(IsNull(flood_depth_raster), flood_depth_raster, dem) I think you can just add the 0.5m to the output like : Con(IsNull(flood_depth_raster), flood_depth_raster, dem + 0.5) ... View more

You code doesn't look quite right should look a bit like this : with arcpy.da.UpdateCursor[fc, fieldss, sql_clause=(None, "ORDER BY date DESC")) as cursor:     for row in cursor:         row_val = row[0]         if row_val not in keepList:             keepList.append(row_val)         else:             cursor.deleteRow() ‍‍‍‍‍‍‍ So there are very few (a tiny %) that are actually deleted. ... View more

In the past I have seen speed improvements of about X 10. So yes, I would expect this to be quicker. How many records are being deleted? ... View more

Use the da module. as in arcpy.da.UpdateCursor(....) ... View more

Or just run through the UpdateCursor and update only where your search column equals the value you are looking for. ... View more

Field maps are about the definitions of the columns, names, alias, type etc and automatically point the content of one column to another. If you want to alter content you will have to use a field calculator or a da.UpdateCursor ... View more

So those 4 lines following "for fc in fcs:" should be indented, usually 4 spaces ... View more

In python code blocks like this loop are marked by indentation of the code, see Dan's original code snippet. ... View more

And this little snip seems to show that the data points are all on the home range boundary. ... View more

If it's been sitting, looking at you for 2 weeks then I would say that something got stuck about 13 days ago. You refer to "pixels" at 5 x 5, is that 5 metres? And Union deals with vector stuff, so how many polygons are we talking about. If you have the original data as raster, that would probably a more efficient way of processing the data. ... View more

Because "Define Projection" should only ever be used when you have some data with no defined projection, or when (like in your case), someone mistakenly redefined an existing coordinate system. Define projection just updates the metadata about the coordinate system of the data but does not actually alter the underlying geometry. To do that you need Project. ... View more

I think the behaviour here is much like anything in a file system, could be wrong though. If you can see / read it, you can copy it. ... View more

You might want to take out that space - if (row [0] is None) But what is the data type of "PRE_DIR". Are you sure it can be a None type? Even an empty string like "" will make it True. ... View more

This is a GIS forum, so why would you actually want to do these calculations yourself? On the subject of UTM zones, each one is the same grid, but calculated on a particular central meridian (line of longitude). Zone 50 = 117degE; Zone 51 = 123degE ... View more