Latest Contributions by MervynLotter

Hi Ceri You need to do a spatial join,joining up your trails to your fishnet layer. Right-click on fishnet layer, Joins and Relates > Joins ... Ensure you select the "Join data from another layer based on spatial location" option, and "Each polygon will be given the numeric attributes of the lines ..." Ensure Sum is checked on.  If you are in a geodatabase, then just use the Shape_Length field. Otherwise you may need to first calculate feature length of the shapefile segments following your intersect. ... View more

More than a year ago I encountered a similar problem and had to uninstall my display driver and then reinstall the driver from manufacturer. If you google this error message there are many suggestions on how to go about fixing it, I followed some of these and I ended up running a 3rd party app to uninstall display driver.  ... View more

You can also customize Pro to always save edits when you save the Project.  I do this. Just go to Project>Options>Editing and then click in the option box to "Save edits when saving project". ... View more

Unfortunately I dont know whether this is possible in Web AppBuilder but do reach out to  https://community.esri.com/community/gis/web-gis/web-appbuilder. ... View more

It is working on my group layers. Not sure why not for you. As Michael asked, what version are you using? ... View more

It is possible. You need to right-click on lend and select properties.  Then under the Format Legend Pane, select Show Properties under Legend Items. Then select to Only show features visible in map extent. ... View more

Hi Hank So you have to have a unique polygon identifier in your imported KML file before running the spatial join. You cant just change the properties, you either have to use an existing field or create a new one.   I just tested this and after importing a KML, the name of your original kml input file will appear in the field FolderPath. Just right-click on this field heading and sort descending. All areas outside of your polygon will have no values and you should see you KML file name at the top of your attribute table (if you kept with the defaults). So lets use this FolderPath field now in the below instructions but you could quite easily also add a new field using the Add Field ... functionality in your open table, but make sure you do this to the imported polygon file after importing but before running the spatial join. Then use a Field Calculator to give it a useful name.  So going with the species field name and FolderPath field names, open Summary Statistics and add these as Case field. Then under Statistic Field, add Species (in my example I use Taxon).  You will get the below error until you select the statistics type on the right. Just click to the right of your species field (where arrow is pointing to) and you should then see more options (rather hidden and not that user friendly unless you know about it). Select count and click OK. The output is a table which will list all the species (and a count of their observations) within your polygons. If you have several unique polygon names then the species list and count will be for each unique polygon. Let me know if there are any problems.   ... View more

You will have to open up your polygon layer to check whether it has a unique identifier, whether it be a grid name, farm or reserve name, etc. The way I understand it, you want a species list with abundances (counts) for each polygon (or one polygon in your case), so each polygon requires a unique name. From the table you provided, I can not easily see if you in fact do have a unique name or number. If not, add a unique name to your polygon then summarize as in my second post. ... View more

Sorry, one small change in my suggestion, you will need to run the Summary Statistics tool.  Statistics Field is species name with stats type as count. The case field will be both your species and polygon name/number fields. ... View more

You are almost there. Do a join from species to polygon so that you have 35k records, then just open attribute table and the the Summarize tool on the unique polygon number/name. In the option to choose one or more summary stats to be included, make sure you select your unique bird name. It will list the relevant species and provide a count. Mike Miller also created a similar online tool to do this, with added diversity indices. Do see Diversity Calculator - Geospatial Brainstorming  ... View more

This is happening to a colleague of mine. The workaround is to use Windows Explorer to browse to file and then double click to open. We don't know why this is happening. ... View more

Hi Greg I experienced what your results are showing. The important step is obtaining the correct elevation for the point where your drone flew from, and creating the raster with a fixed altitude. I used the Manage GCP functionality get the correct altitude using the *add ground control points from map functionality*, to get the correct altitude. I then created a large polygon covering the area I surveyed and added the flight to the attribute field. Then I create the raster from that (polygon to raster tool). If your results are failing, try adding your raster to a Local Scene and set the layer properties to an absolute height. I haven't tried this, but it should show you if there is an error with your raster elevation. Good luck. Cheers Mervyn ... View more

The various outputs should be aligned, I dont know why they are not. I tried a different data-set this evening and I can replicate your error.  I think the AREA field (and Shape_Area field if you summarize it) may be wrong and I have no idea why. Same projection, no overlapping polygons, ran repair geometry, etc.  I dont have more time to spend on this now. Perhaps use the Summarize Within tool for the time being, as Drew Flater suggested.   ... View more

Hi David This was an incredibly useful post, thank you. I have a DJI drone and I have been struggling with creating a 3D products from Drone2Map that are vertically aligned with the surrounding landscape. I have tried adding GCP points but that usually results in a very skewed final product. This ultimately results in me not wanting to share my Drone2Map products with others until such time as I sort out the altitude problem. Your workflow has solved that.  To simplify your workflow, I have created a new idea for Drone2Map on the ArcGIS Ideas site. Do see https://community.esri.com/ideas/15040  Thanks so much. Regards Mervyn ... View more