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That was actually my comment and should have had a "not" in there: ...the raster extents are not in decimal degrees...
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08-21-2017
11:22 AM
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The hard part is probably making the custom GCS. Here's the complete well-known text: PROJCS["China_NetCDF",GEOGCS["GCS_Sphere_6370000",DATUM["Sphere_6370000",SPHEROID["Sphere_6370000",6370000.0,0.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",110.0],PARAMETER["Standard_Parallel_1",20.0],PARAMETER["Standard_Parallel_2",50.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",39.51774597167969],UNIT["Meter",1.0]] Copy the string to a text file (Notepad, not Wordpad or Word) and give it a .prj extension. Then you should be able to Import it when setting the data frame or defining the coordinate system of a dataset. Melita
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08-18-2017
09:50 AM
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The raster itself has a longitude range of 0 to 360. Is that what the raster's extent shows? Melita
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08-17-2017
05:06 PM
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Max point count is way too large. The Buffer Tool when building a point buffer of 500 m at 52N (latitude) uses about 160 points. For a buffer of a a few kilomters, I wouldn't use more than a few hundred points.
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08-17-2017
04:30 PM
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I think when you ask for the distance, you're getting the "geodesic" distance. You might see if there's a setting to switch to the Cartesian or projected distance. The geodesic distance is closer to the actual ground distance. Mercator wildly distorts distances away from the equator in favor of maintaining the shapes and angles of features. The measure tool is likely set up to return the geodesic distance so that if someone measures Los Angeles to New York (for example) they get a value that matches what someone knows already or can look up. Melita
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08-16-2017
11:54 AM
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I'm not sure that the basemap is actually a "basemap". I think it's just a raster that the OP is using as the background/base layer in the map. Ken, there used to be an issue when a raster is being both reprojected and rotated via a map rotation. Is the raster being projected on-the-fly? If so, can you try either not reprojecting and see if the same problem occurs or using the Project Raster tool to create a copy of the raster in the map's coordinate system. Melita
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08-15-2017
04:55 PM
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What's the coordinate system? geometry.extent.height in, say, Web Mercator, could be giving you the actual height (north-south dimension) which is very exaggerated away from the equator in any Mercator-based coordinate system. The web map tool/widget may be returning the geodesic distance (shortest distance on the underlying ellipsoid model) rather than the projected/2D Cartesian distance. Melita
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08-15-2017
04:42 PM
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The Feature Class to Feature Class tool? Right-click the target geodatabase in ArcCatalog and use the Import option? Right-click the feature class (in ArcCatalog) and use the export button?
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08-15-2017
04:40 PM
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I don't think you can. a gdb file is a geodatabase that contains feature classes. A mxd is a map document which has references to data-on-disk or web services. References, not the data itself so you can't export data out of an mxd file.
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08-15-2017
04:25 PM
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I think you have the input coordinate format wrong. It needs to be set to MGRS, not DD_2. However, you would need to remove at minimum the space between easting and northing values. 16QCQ 56737 43993 -> 16QCQ 5673743993 However, USNG does allow the space, but data should be in the US, and it assumes NAD83. Supported Notation Formats (it's Pro doc, but same as ArcGIS Desktop) Melita
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08-09-2017
03:41 PM
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Hi Sophi, That often means that we don't recognize the coordinate system (spatial reference) of the input data. For instance, there a different name or a value is not quite the same. Try redefining the coordinate system using the Define Projection Tool or the data's property page in ArcCatalog. Could also occur if you're not directly using the coordinate systems folder to pick the output coordinate system but importing it from other data or a file. Melita
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08-04-2017
11:05 AM
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If you have EPSG well-known IDs for the coordinate systems--like 4326 = WGS84--you can type them into the search box. If you have a list, you could post or email me and I can tell if they're available under a different name or in a later release. mkennedy at esri dot com
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08-04-2017
11:02 AM
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There are a few different ways to do this. 1. Add XY Coordinates tool (in Data Management, Features). It checks the output spatial reference setting in the ArcToolbox/Geoprocessing environment settings, so you could set it to NAD 1983 or whatever the geographic coordinate system is that's being used by the State Plane system. 2. Add the data to ArcMap. Set the data frame's coordinate system to match what you want the coordinates to be in. Open the layer's attribute table. Add two new fields of double type. Right click a field and select calculate geometry. That dialog will let you use the data or data frame's coordinate system. If you want anything other than a point's coordinates or the centroid of a polygon, you would have to use the Field Caculator.
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08-02-2017
12:37 PM
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Joe, Did you mean Margaret Maher's book: Lining up Data in ArcGIS? Oh, the book you're referring to is one used as part of the ArcGIS Workstation documentation (version 8). Almost all the information is in the online documentation of ArcGIS Desktop. Melita
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07-27-2017
02:15 PM
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