Latest Contributions by IanMurray

‎10-20-2014

Hi Patrick USGS DEM files (.dem extension) cannot be brought directly in to ArcGIS, they must be converted to another raster format first. Try using the ArcGIS Geoprocessing tool DEM to Raster to convert to your desired file type(see help below). The converted raster should open no problem. ArcGIS Help 10.1

‎10-16-2014

Another thought on seperating out grass from ferns, since ferns are more broad-leafed then grasses, they might be more likely to get multiple returns than from grass(usually only get single returns from grasses), so that could possibly help differentiate between the two. Without actually having your datasets I'm just theorizing, though if you wanted to share you data, I'd have no problem taking a look at it and seeing if we could come up with something.

‎10-14-2014

Wow I knew there was a better tool but for the life of me I couldn't think of it, I've gotten so use to the address locator bar for quick navigation. My bad on not remembering that one sooner

‎10-14-2014

As long as it works for you. Sorry it took so long to get it working for you.

‎10-14-2014

I'm trying not to pull my hair out over this, as this should be such a simple thing to do! okay, so checking some more help files, and testing the coordinates from your screenshot, it appears that the longitude needs to be put in first, then latitude. I got the location just south of Ozark, Arkansas. Apparently the preferred format for inputting Lat/ Long is like so, W93.834, N35.475 or -93.834, 35.475(see the help below for acceptable Lat/Long formats). ArcGIS Desktop

‎10-14-2014

Try dropping that 0 from in from of that first number, that is probably messing it up. I'm on ArcGIS 10.2.2 hence why the geocoding services are different, I'm guessing you are on 10.0?

‎10-14-2014

Hmmm, To the left of the type an address bar, there is a bar that picks your geocoding service, make sure it is using World Geocode Service(ArcGIS Online). More help on the Geocoding Toolbar ArcGIS Desktop

‎10-14-2014

It says type an address, but you can also type in lat/long coordinates, just make sure they are comma seperated(i.e. 55.34212,-74.31234)

‎10-14-2014

Hi Mike, Go to the customize tab, and turn on the geocoding toolbar. On the bar there is the option to type in addresses, or lat/long coordinates. Type the coordinates, then if it find the location, right click on the bar and select zoom to or pan to. Should make it easy to navigate to. If you have the coordinates in a table format, you can import the the table into arcmap and create an xy event layer from the coordinates, which makes it much easier to view your points then just zooming to them with no representation. Check this link for that. ArcGIS Desktop

‎10-14-2014

I think your issue is that you are trying to save the .lyr files to a geodatabase, someone correct me if I'm wrong, but I don't think you can save .lyr files to a gdb. You will need to save the layer files to a different workspace.

‎10-09-2014

The classes are built into las files, but not ever company has a good algorithm for putting the points into classes, so its not surprising that you don't have many points in classes or that a large number of classes are empty, but I figured it was worth asking. As far as your plan, thats what I would likely do in your scenario, generate the DEM from all ground class returns(almost every company has an algorithm for classifying points as ground, since LIDAR is so widely used to generate DEMs, and you want only ground points to be used to make DEMS), and the DSM from all first returns, then extract the height information from subtracting the two(Giving your a height model of features). You will are a bit on your own defining what classifies as low/medium/high vegetation. In a study area I work in, I have it at 0-3ft/3-9 ft/>9 ft for low/medium/high vegetation, but depending on your area and the flora, you might want to make your own ranges, or use your ground truth to help determine which ranges work best. I'm guessing there are other features on the island that you might need to seperate vegetation from. The intensity values could help you distinguish grasses from bare earth or sand, or vegetation from man-made materials if they are present. Where exactly is your study area(I'm curious)?

‎10-08-2014

I didn't think about this earlier, but I just got back from a conference and talked with a bunch of guys from the US Geological Survey and they reminded me that alot of .las files now have points that have been classified into different classes, such as low vegetation, medium vegetation, high vegetation, buildings, ground, etc. If your las files already have these classifications made, then it would be extremely easy to do what you are asking. Older Las files usually only have points classified as ground or non-ground, but depending on how recent your data is, the points in your las my already be classified. What is the source of your LiDAR data?

‎09-26-2014

Hi Jutta, with arcpy.da.SearchCursor(outtableSUM, "SUM_SUM_ar") as cursor: for row in cursor: print (int(row[0])) fieldsum = (int(row[0])) print fieldsum you are setting the value of fieldsum after the cursor finishes running. Are you trying to sum up the values in "SUM_SUM_ar"? if so, you need to make it a variable prior to the cursor then add the value of int(row[0]) to it each time fieldsum = 0 with arcpy.da.SearchCursor(outtableSUM, "SUM_SUM_ar") as cursor: for row in cursor: fieldsum+= int(row[0])) print fieldsum

‎09-26-2014

Since it is an event layer, and not a feature class or shapefile, it is not editable. You can make it a shapefile right-clicking on the event layer in the TOC, selecting data > export data. You can then edit that new layer that is based on the shapefile. In the future, if you are planning to create data like this for use. I would recommend importing the data a different way, navigating to the sheet in the Catalog, right clicking on the sheet and select > Create Feature Class > From XY Table.

‎09-26-2014

I believe that CSVs don't support cell formatting i.e. all cells are general and not cannot be made numeric(unless you saved as xlsx or xls). An easy solution would be to make a new numeric type field in your layer and then make it equal to the value of your existing field. That way it would be recognized by the quantities symbology

Online Status	Offline
Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by IanMurray

Re: Hi Geonet! I can't get an SRTM30 DEM to display in Arcmap properly, help?!

Re: How does one characterize habitats using lidar data (LAS files, LAS datasets, xyz files)?

Re: go to a lat/long

Re: go to a lat/long

Re: go to a lat/long

Re: go to a lat/long

Re: go to a lat/long

Re: go to a lat/long

Re: go to a lat/long

Re: Problem in SaveToLayerFile_management

Re: How does one characterize habitats using lidar data (LAS files, LAS datasets, xyz files)?

Re: How does one characterize habitats using lidar data (LAS files, LAS datasets, xyz files)?

Re: Calculate Field with arcpy

Re: CSV

Re: CSV

Re: Dynamic Text in the Legend

Re: Draw Line.

Re: New to ArcMap - Contours from .sid?

Re: Unknown Coordinate System of 1900s USGS Topogr...

Re: Could someone please explain this python failu...

Esri Forestry Group (EFG)

LIDAR Resources

ArcAPI

Addressing