Latest Contributions by IanMurray

You cannot directly create symbologies using arcpy, you would need arcobjects.  However, you can set up a .lyr file with the symbology you need and have the .lyr file symbology applied to your multi-ring buffer output. ArcGIS Help (10.2, 10.2.1, and 10.2.2) ... View more

I'll go ahead and mention a few things as well I would make your lake the same color as your streams instead of the color ramp. Your roads show fine in the urban environment but once out in the more rugged areas are difficult to see due to the amount of contours and how wide they are. Depending on audience, I might increase the number of contour labels by using the Maplex Labelling Engine.  If they are not use to reading topography, the fewer labels makes it less intuitive. Are you using a color ramp on your terrain?  It seems green near the top and greyer near the bottom, which can lead to confusion.  When I see green on topo maps, I automatically think forested areas, which doesn't seem the case here. Your Forest Plan Units(FPUs) have grey lines running through them(parcel lines?) I think they would look better as a single unit unless you have a good reason for the lines in there. Either make the FPUs more transparent or move the streams to draw on top of the FPUs, since it is easy to lose them right now. Streams seem a bit wide, especially the more minor ones.  If you information on stream order, perhaps graduated line thickness based on the stream order.  Also labels for major creek/rivers could be a nice touch. If possible, see if saving as a reduced size pdf doesn't interfere with data quality.  A 60Mb pdf is rather large to work with, and from my experience, using reduced size pdfs can save alot on file size without impacting the quality much. ... View more

Rickey, This question is very open-ended.  It is highly dependent on what you are overviewing, what sort of data you want to show.  You should consider who your audience is, what information you want to convey, etc. Could you give a better example of what you are trying to accomplish?  Also, sub-watershed level is very vague, since watersheds are broken down by level already (at least in US you have HUC-2 level to HUC-12 level). ... View more

Hi Bruce, If you have multiple overlapping DEMs, it might be good to Mosaic them together into a single image.   There are many tools for doing this, but you probably want to keep your original data the same, I'd suggest Mosaic to New Raster.  That way none of your originals get changed, and you have a new single DEM file to work with.   If there are differing values for the same location, you can control how you want them to combine in the mosaic_method parameter. ArcGIS Help (10.2, 10.2.1, and 10.2.2) ... View more

Glad to help, right tool for the job. ... View more

I'm not good with the .format string function, but the .zfill string function should do what you need from 7.1. string — Common string operations — Python 2.7.10 documentation https://docs.python.org/2/library/string.html string. zfill ( s, width ) ¶ Pad a numeric string s on the left with zero digits until the given width is reached.  Strings starting with a sign are handled correctly. ... View more

Also the USGS Historic Topos have a lot of other data built into them, such as streams, tree coverage(green shading, though somewhat dated), geomorphologic feature labels, etc.  Trying to recreate most of these would be rather time consuming.  P.S. I find it funny Dan Patterson​ hasn't responded to daniel patterson​'s post yet.  It would amuse me greatly if he would. ... View more

Yes I meant like that ... View more

The particular map that shows the topography are historic USGS Topo Maps, you should be able to download them in your area of interest and clip them to the boundary you need.  See: USGS Historical Topographic Maps | topoView Luckily these are available as GeoTIFF, as well as GeoPDF, so much easier to handle in ArcMap Now that map also seems to have a hillshading beneath it to help enhance the look of the elevation data, there are some online layers for hillshade, but you will likely want to download your own and clip to a custom extent.  You should be able to find that, and many other vector layers here https://gdg.sc.egov.usda.gov/ ... View more

As Mike said, we would have to see the script, are you able to post a copy? ... View more

You can work with arcpy Geometry objects to create polylines from points. ArcGIS Help (10.2, 10.2.1, and 10.2.2) Working with geometries ArcGIS Help (10.2, 10.2.1, and 10.2.2) Arcpy.Polyline You will need to be able to parse each set of lat longs, convert to point geometry make arrays of points for each line, then insert the arrays into the Polyline Object. ... View more

Have you tried using arcpy.Exists? ArcGIS Help (10.2, 10.2.1, and 10.2.2) From the help Determines the existence of the specified data object. Tests for the existence of feature classes, tables, datasets, shapefiles, workspaces, layers, and files in the current workspace. The function returns a Boolean indicating if the element exists. ... View more