Latest Contributions by XanderBakker

First of all verify the location and name of you sde (connection) file: On Windows XP or Server 2003, navigate to Documents and Settings > <user_name> > Application Data > ESRI > Desktop<release#> > ArcCatalog. On Windows Vista, 7, or Server 2008, navigate to Users > <user_name> > AppData > Roaming > ESRI > Desktop<release#> > ArcCatalog. The file has an extension of .sde. Example I have one here: conn = r"C:\Users\xbakker\AppData\Roaming\ESRI\Desktop10.1\ArcCatalog\NameOfMyConnectionFile.sde" To make use of the ListTables and ListFeatureClasses(), you will have to set your connection file to be the current workspace. You can do this like this: arcpy.env.workspace = conn Since featureclasses can reside in datasets you should list the available datasets first; lst_fds = arcpy.ListDatasets() lst_fds.append("") The second line is to append an empty string to the list of feature datasets, since featureclasses may reside outside a dataset. Next go through each dataset in the list and create for each dataset a list of featureclasses: for fds in lst_fds:     fcs = arcpy.ListFeatureClasses(feature_dataset=fds) Using this list of featureclasses you can loop through each featureclass in that list and do something with it:     for fc in fcs:         print fc So the script to, in this case, print the names of all the featureclasses in the enterprise geodatabase would be: import arcpy # name and location of your connection file conn = r"C:\Users\xbakker\AppData\Roaming\ESRI\Desktop10.1\ArcCatalog\NameOfYourConnectionFile.sde" # set the current workspace arcpy.env.workspace = conn # create a list of feature datasets and append an empty string to the list lst_fds = arcpy.ListDatasets() lst_fds.append("") # loop through the list of feature datasets for fds in lst_fds:     # list the featureclasses in the current dataset     fcs = arcpy.ListFeatureClasses(feature_dataset=fds)     # loop through each featureclass in the current dataset     for fc in fcs:         # do somethig with the featureclass         print fc Kind regards, Xander ... View more

Added an example of using "eval". Enjoy, Xander ... View more

Hi Neil, I added your example with some additional explanation to the document (in ' Working with Lists'). Thanx for your contribution! Kin regards, Xander ... View more

I guess you are looking for the REST API. In case you want to query a featureservice layer you can find the details here: ArcGIS REST API - Services and Data Types In case of a map service more info here: ArcGIS REST API - Services and Data Types The JSON syntax of geometries can be found here: ArcGIS REST API - Services and Data Types Kind regards, Xander ... View more

Hi Leo, The argument (list of rasters) is indeed incorrect. If you look at the help page, at the bottom there is a python sample. The list of raster is actually a string and each raster is separated by a semicolon. Be aware that the name of each raster should include the workspace in case the rasters do no reside in the current workspace. There is actually more. I noticed that first and second list will actually contain the same information, since they point to the same folder. So you have to check that too. If you are sure that there are as many h26 as h27 tiffs and the structure of the name is the same. You can create a list for the h26 rasters and derive the h27 name from it. Kind regards, Xander ... View more

Hi Andrew, Maybe the "Mosaic To New Raster (Data Management)" with the BLEND mosaic method comes close to what you are trying to obtain: BLEND —The output cell value of the overlapping areas will be a horizontally weighted calculation of the values of the cells in the overlapping area. Kind regards, Xander ... View more

Hi Miranda I hate to disappoint you, but when you georeference a satellite image in ArcMap, you still do not have the necessary data to generate a Digital Elevation Model. Have a look at this Wiki GIS article: Digital Elevation Model - GIS Wiki | The GIS Encyclopedia or this presentation that I created a while ago on Digital Elevation Models and their applications:Digital Elevation Models - WUR - Grontmij There are however a lot of free DEM (or LiDAR) resource where you can download DEM data directly. To give you a few pointers: Digital elevation model - Wikipedia, the free encyclopedia http://nationalmap.gov/elevation.html Free Satellite Data - TERRAINMAP Satellite Image Analysis USGS SDTS format Digital Elevation Model data (DEM) Lidar Links of Use in Mapping EarthExplorer Kind regards, Xander ... View more

Hi Phil, Thanks for sharing! It sounds correct to me, although some of the point locations look a bit odd (at the extremes east and west, but might have to do with the differences in angle when it's near to sunrise or sunset). You could use the solar radiation tools provided by ArcGIS to test the area you want to clear. You should add the trees (area not being logged with an altitude of 70ft) and test the solar radiation it receives. Kind regards, Xander ... View more

You´re welcome ... View more

Good to hear that Phil. Python is the scripting language for these type of problems. If you manage to solve the problem, share a little map of the result. It will be interesting to see what it looks like. Kind regards, Xander ... View more

I guess a python script as scheduled task (that runs each night) could do this job automatically. ... View more

You might be interested in this thread: Extract Feature Attachments Kind regards, Xander ... View more

Not sure why you want to do this... It is possible to "hide" the column. This way the data remains, but is not visible. In case you don't want to keep the content of the column you can replace them with Null of blanks... Kind regards, Xander ... View more