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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.
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03-22-2013
08:29 AM
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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?
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03-22-2013
07:31 AM
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I just installed Collector for iOS and despite having a full ArcGIS online account I don't see any maps in the app once logged in. There are no maps visible under "All", My Maps", or my "Organization". I've logged in and out several times but nothing changes. What should I be seeing once logged in? It sounds like even a basic online account would show a series of maps available for viewing under "All".
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03-21-2013
06:42 PM
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I have a researcher who is looking for the definition of the attribute field EDUCBASECY (2010 Pop 25+ Educ Attain Base) from the 2010 BA data. I don't see this listed in the variable list doc for my current BA dataset and can't find anything online other than the old 2010 variable list. I assume this is simply the total number of individuals per unit, that are 25+ and have attained some level of education (the base population). Any help is greatly appreciated. David
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03-18-2013
08:30 AM
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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
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03-14-2013
02:18 PM
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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.
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11-30-2012
11:59 AM
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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.
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11-29-2012
04:20 PM
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I'm helping several groups of students use Community Analyst for their class projects. We've been extremely excited about how easily CA lets us explore census data. The problem is CA seems to be very limited in terms of actually letting you use that data directly in ArcGIS. It has a 100 record join limit and I haven't been able to figure out how to extend the first join into the next set of 100 records. Is there any way to join more than 100 features or records at a time? I can't see any way to download the raw tabular data instead of the aggregated report.
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11-28-2012
10:39 AM
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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.
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10-22-2012
05:20 PM
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I have some geo referenced images that I need to extract a series of pixel values for at specific lat/long locations (that part is easy). I also need to extract the image x and y for each of these pixels and I don't see any way to do that in Arc. Any suggestions for getting the image xy (not the map xy) from an image layer based on input coordinates or points? Thanks, David
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10-22-2012
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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.
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10-15-2012
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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?
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10-12-2012
05:32 AM
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I'm trying to build a mosaic dataset for a collection of ASTERv2 DEMs and am running into an issue with the appearance of the mosaic. Following the instructions in the link below I calculated statistics and built pyramids for my ASTERv2 tiles before adding them t the mosaic dataset. I then created overviews so I could preview the mosaic at full scale. But when I finished the resulting mosaic looks mostly gray, as though no stats had been calculated. I've then tried to clac stats for the mosaic itself but the process never finishes. I've tried several times up to 91 hours for the longest attempt with no results. When I compare my ASTERv2 mosiac to a older ASTER mosiac we have which does look ok as a mosaic the only difference I see is that the input tiles to the older mosaic did not have statistics built first. You cans ee the difference in the attached PDF. Any idea what I need to do to get this newer version to look like the older version? Do I need to go back and remove statistics from the tiles before adding to the mosiac? http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009t00000039000000 I appreciate the help, David
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10-09-2012
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I have a student who is interested in measuring the curvature of sections of a coastline and I'm wondering if anyone has any experience with this kind of geometric calculation using ArcGIS?
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09-17-2012
03:30 PM
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I'm wondering if there is a way to populate an attribute field for a feature with that features name? I have a series of about a thousand polygons as shape-files. The attributes for each are identical, ID 0. But the names are unique, in fact each name encodes 3 attribute values for each feature. I need to merge all of these features into a single feature class but maintain the unique name for each in the new attribute table (to later be parsed into separate fields). Is there a tool or script for adding the name of a feature to its table?
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08-14-2012
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