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Yes, I agree with that overall. The raw data is lat, long, altitude locations. But I do need to add vertices because the time between sample points is too great. The aircraft can transit a restricted area without collecting a GPS point. I think I am going to go with: Densify Feature Vertices to Points Add XY Coordinates Extract Values to Points Calculate Field Then based on this output I can select points and buffer then cut my original lines to show problem areas of the flight.
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12-30-2016
11:26 AM
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I have 3D flight path data. I want to know if the aircraft is violating above ground altitude restrictions over sensitive areas. I have a raster mosaic of national elevation data for the areas of interest. I was originally thinking that I could turn the line into a raster with the cell values containing the interpolated z values along the line (Looks like arc can not do this out of the box? ). Then I could do map algebra to compare the two surfaces. If the difference between the two surfaces is below the min above ground recommendation the flight will be flagged for investigation. Now I am thinking of using densify on the line turning it into points and comparing them to an extraction by point from the ground raster. I am sure I am not the first person to want to do this. Does anyone have any good suggestions for this problem? I have thousands of flights to process for the next few years so I will be scripting the solution. Thanks, Forest
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12-29-2016
05:40 PM
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I have a CSV file with time date data in a field. Arc is disregarding the header for the field and setting it to TIME. Is this the expected behavior? I sure did not expect it.... I have deleted all but the offending fields out of the attached csv. If one looks at it in Excel or notepad++ the header is PINK_DOG; however, when I look at it in ArcCatalog the field is named TIME. ArcCatalog 10.1 Excel I want to import this into a FGDB and then append that into an SDE feature class. I would rather not have to deal with field mapping the time field to the proper SDE filed.
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12-21-2016
11:12 AM
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Thanks Richard. I have enjoyed the addin over the last year+ in our 10.1 environment.
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12-13-2016
12:05 PM
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We have an android GPS application for tracking off road vehicle travel. Please keep in mind that I am not a master developer. The current setup: We are getting 32 GB cards with the FAT32 file system on them. They are then formatted to exFAT to handle ~6GB tpk. We are then placing the tpk and a runtime geodatabase on the cards. Also, a folder is made on the card to output the tracks to as csv files. Then we install the cards in the device and encrypt them (we also have the device file system encrypted) . When the user wants to export the data off of the device they request the export from within the application and the csv files are exported to the sd card folder. Then the user connects the tab to a windows machine and copies the csv files to a network location where they are loaded into a SDE by a python job. We are on Samsung 10.1 Tab 4 running Kitkat and Lollipop. But we will need to add some new Samsung 10.1 tabs soon running Marshmallow. The problem: The SD cards keep getting corrupted. The cards stop working. If we then try to reformat the cards (with the quick format) windows will state that it is unable to complete the format. So, there is a push to stop using the cards. The questions: 1) Can I just copy the tpk and runtime geodatabase to a folder on the device file system. Say to \Android\data\myapp and have the application use them from that location? This sure looks like it will work fine to me provided we have enough free space on the dev tab I have running KitKat. 2) Can I also export my csv's to \Android\data\myapp on the device file system? Would this require me to use MODE_WORLD_READABLE context for the files to be accessible from the PC side? Also, is this just kinda a lame way to do it. We do have ArcServer. Could we just push the files to the server and then to the SDE? How hard would that be to setup and maybe more importantly maintain? 3) Are the solutions to question 1 and 2 likely to work in Android N (Android 7). Thanks so much for any input!
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12-12-2016
04:18 PM
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ooops.... I fixed my typo. Thanks for the info Dan. 14. Floating Point Arithmetic: Issues and Limitations — Python 2.7.12 documentation
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11-02-2016
07:29 PM
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I would like to round some elevation values to the nearest 100th in my a set of rasters. I would like to walk through the numbers for one cell. 1) raster_0 * 100 + 0.5 179.519989 * 100 + 0.5 = 17952.498047 2) Int(raster) Int(17952.498047) = 17952 3) Float(raster) Float(17952) = 17952.000000 4) raster / 100 17952.000000 / 100 = 179.520004 What is up with the 4 in the millionths place? Raster properties.
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11-02-2016
03:50 PM
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Thanks for the feedback Cody. 1) The xyz data looks tight. There are no gaps and the points are at 3 foot spacing across all of the files I have looked at. 2) This is a vendor provided dataset. They have given us bare earth as well as what they call "Full Feature" (I am not sure if that is an industry standard term but it is the surface reflection). But, all I care about is the bare earth. I don't have a lot of time into the processing so far. Mostly, just research to understand the correct path forward. I would guess that the vendor has insured that the edges of the xyz "tiles" mesh up nicely. Artifacts on the seams would be bad. 3) Processing time is not a big deal. I would like to be done in a few days. Based on my work so far I think this is realistic. 4) The data will be used in ArcGIS desktop and other geospatial applications such as Petrosys. In the end it is a little hard to predict all of the ways that it will be used. My plan is to make tiffs off of it and then create a mosaic dataset. People can use the tiffs if their application can not consume the mosaic. Thank you for the void fill tip. If this workflow does not pan out I will try your alternate workflow.
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11-01-2016
02:57 PM
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I have ~1500 xyz files (I also have the corresponding las files) that I want to make into DEMs. I have tested out the below workflow--looks like it works as expected. How To: Convert points in XYZ file format to raster My point spacing is 3 feet for all of the xyz files. So, I am thinking I can just script or run in tools batch mode to get through the 1500 files. I am wondering if there is a best practice for the raster interpolation portion of the workflow? I used IDW for the test with the default setting. Thanks!
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10-31-2016
03:54 PM
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Very cool. Thanks taking the time to reply. At this time we are not using a scale bar in the application.
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10-31-2016
02:23 PM
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Or if all you are trying to do is identify the owner interactively give the Identify tool a go:
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10-28-2016
02:21 PM
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I short I don't think there is a simple way to do this in Arc. I would be inclined to make polygons out of my polylines and color them by interest/owner.
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10-28-2016
02:13 PM
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