Latest Contributions by DavidMedeiros

The biggest difference is that you need to have an editable point feature service (lines and polys are coming in a future release) in the map for it to be compatible with the Collector.   If you want to share the map with me I can take a look. Ok, that's the critical piece of missing information. Thank you. I'll experiment with a point layer and see how that works. ... View more

In the app itself from the sign in page there should be a link that says learn more you can tap that to get more information on how to author maps for data collection, that link will take you to http://resources.arcgis.com/en/collector/  where we have a few tutorials to help you get up and running.  Once you've authored a map for collection, log in to the app with your organizational account and it should show up. I'll take a closer look at that. I followed what looked to me to be similar workflows for creating a map in ArcGIS online assuming anything I created there would be available as a map base in Collector. There must be a specific step in the map build process that makes it available to Collector? ... View more

Thanks for the reply Curtis. I'm the GIS research specialist helping Amy with her model and suggested she look to the forum for more help. Unfortunately the constraints of academic based GIS research are such that "learning python" isn't really an option for most researchers, especially those with no prior programming background. I've used iterators in model builder quite a bit but am not familiar with model variables (other than %name%). In your example ""TOMS_%year%m%month%*", where do the year and month model variables come from? Can we create a list for the years and add that as a variable to the model or do we need to run a search cursor to get all of the names first? I found this python tool for raster lists (http://resources.arcgis.com/en/help/main/10.1/index.html#/ListRasters/018v0000003w000000/). Is this what we need to nest, one list for yearly raster then another for each month in that year before running the CellStats tool? Appreciate the help, thanks. David ... View more

David, I believe the limit should be around 3500 features unless this somehow changed.  I will double check internally. Regards, Jason R. I just checked again, we are definitely running that add-in. The FAQ for the add-in says 100 records at a time. It says you can batch them 100 records at a time but selecting the next set of 100 records in our feature class doesn't seem to work so not sure how you add more records with out splitting your features up into separate 100 feature tables. I have groups of students who all found data they need from CA but for hundreds or thousands of records. Splitting their tables up is not really practical and the limit makes CA more or less useless to them. I was hoping to get a quick forum answer but this is looking like a larger problem for us, I'll probably move over to ESRI help next. Thanks. ... View more

David, If you are using the Import File on the Select Location tab there will be a limit of 100 at a time. Based on what you are looking to do you might want to take a look at the Community Analyst Add-in for ArcGIS.  It would allow one to not only run CA reports on a polygon feature but also an option to append that reports data back to the polygon layer.  Also no limit of just 100 at a time. http://www.esri.com/software/arcgis/community-analyst/ca-addin Regards, Jason R. Thanks Jason, although that doesn't make any sense to me. As far as I know, I am already running the CA add-in to ArcGIS. It launches from inside ArcGIS and looks just like the screen shot in that link, but it still limits the number of features it will directly append to. ... View more

I actually do know how to extract values to points. What I am after is the corresponding image x/y coordinates (pixel xy in the image, not geographic xy), that go with the lat/long points. The student I'm working with needs the image xy to use in a separate script he's written that analyzes the pixel values for cloud cover and radiance at specified locations. It's not a GIS script so it just needs image coordinates for the pixels. I think I have a workaround but would still like to know if Arc can determine the image coordinates of a point over the image. ... View more

In ArcCatalog, go to Customize > ArcCatalog Options > Raster tab > Raster Layer tab.  What is your stretch and resampling set to there? Also, you can speed up the calculation of statistics by specifying a skip factor in the Calculate Statistics tool.  This will give you a generalization of the statistics. I ran the clac stats tool with a skip factor (100 and then 50). The tool ran much faster (5 - 15 minutes), and although it seemed to finish successfully, there was still no change in how the mosaic previews and the statistics fields under Properties is still blank. ... View more

Thanks Jake, I'll give that a try for ArcMAP.  My problem is that what I really want is for students who are going to be evaluating the data in ArcCatalog to see the higher contrast images in the ArcCatalog Preview tab as well. That's why I was using the calc stats. I think it took overnight, maybe 6-7 hours, to calc stats on the individual tiles in the mosaic, so I can't image it would take longer than 91 hours for the mosaic itself but maybe it's trying to do it to all of the overviews as well. I'm guessing it has something to do with the order I'm applying the overviews, stats, pyramids etc. And from looking at the original ASTER mosaic I have I can see that while stats were successfully built for the mosaic, they were not done for the tiles. So maybe I need to remove them from tiles first. Hi David, Depending on the amount and size of imagery that makes up your mosaic dataset, building statistics can take a long time.  To see features in some images or raster datasets, or to distinguish  them more easily from the surroundings, you may want to alter the  stretch applied to the histogram. In many cases, you can get the  enhancement you need by stretching based only on the pixel values within  the display and not using all the pixels in the raster dataset. This is  a dynamic range adjustment (DRA).  Try the following: 1.  In ArcMap, go to Windows > Image Analysis 2.  In the Image Analysis window, select the mosaic dataset, check DRA, and set the stretch to 'Std-dev' and resampling to 'Nearest Neighbor' Does this improve the display of your mosaic dataset? ... View more