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Rick,</div>
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Yes, this is exactly my situation. I am using a version installed from conda. I managed to create a copy of the shapefile_utils.ncl function and swapped out all the x, y calls. So far, this appears to have worked. Though, I do not know why this version
is different than the non-conda-installed version. </div>
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Thank you for replying.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Rick Brownrigg <brownrig@ucar.edu><br>
<b>Sent:</b> Monday, January 25, 2021 3:53 PM<br>
<b>To:</b> Holman, Kathleen D <kholman@usbr.gov><br>
<b>Cc:</b> ncl-talk@mailman.ucar.edu <ncl-talk@mailman.ucar.edu><br>
<b>Subject:</b> [EXTERNAL] Re: [ncl-talk] Swapped x, y coordinates of shapefile?</font>
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<div>Hi,</div>
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<div>Yes, there have been reports of this with NCL v6.6.2 as distributed via conda (does that describe your circumstances?) I don't know the root cause nor am I in a position to investigate. However, as a kludge, you can certainly swap the shapefile's x/y
coordinates in any of a number of ways, perhaps something like:</div>
<div> myShpFile = addfile(....)</div>
<div> ...<br>
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<div> theActualXCoord = myShpFile->y ; Swap X/Y to fix known bug...<br>
</div>
<div> theActualYCoord = myShpFile->x <br>
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<div>Hope that helps...</div>
<div>Rick</div>
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<div dir="ltr" class="x_gmail_attr">On Mon, Jan 25, 2021 at 3:30 PM Holman, Kathleen D via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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Hello,</div>
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I am trying to use the shapefile_mask_data() function to mask precipitation data (time, lat, lon) using boundaries defined in a shapefile, subs_buff_mod.shp. When I plot the shapefile in ArcGIS, the spatial extent appears correct (see screenshot). This basin
is in Colorado, so the latitude extent should be between 40 and 40.5 north, while the longitude extent should be between -106 and -105 east. Unfortunately, the mask function continues to produce missing values, and I *think* the reason for this is because
the x and y coordinates of the shapefile are getting swapped when I import the shapefile into NCL. Here is a snippet of text from the print_shapefile_info() command. The latitude and longitude ranges are swapped from what they should be for Colorado, but
again, the shapefile properly plots in ArcGIS. Can I swap the coordinates somehow? Any idea where this happening or <span style="background-color:rgb(255,255,255); display:inline">how to remedy this?</span></div>
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(0) ======================================================================
<div>(0) Filename: "../GIS/subs_buff_mod.shp"</div>
<div>(0) Geometry type: polygon</div>
<div>(0) # of features: 8</div>
<div><b>(0) Min/max lat: -105.82/-105.45</b></div>
<div><b>(0) Min/max lon: 40.23/ 40.50</b></div>
<div>(0) Variable names and their types:</div>
<div>(0) geometry : integer</div>
<div>(0) segments : integer</div>
<div>(0) x : double</div>
<div>(0) y : double</div>
<div>(0) Shape_Leng : double</div>
<div>(0) Shape_Area : double</div>
<div>(0) HydroID : int64</div>
<div>(0) Name : string</div>
<div>(0) BUFF_DIST : double</div>
<div>(0) ORIG_FID : int64</div>
<div>(0) ======================================================================</div>
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Here are the min/max values of the latitude and longitude coordinates associated with the precipitation data. </div>
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(0) latitude (degrees_north) : min=36.532672 max=50.232124
<div>(0)</div>
<div>(0) longitude (degrees_east) : min=-114.7339440000123 max=-90.00160000003234</div>
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Thank you,</div>
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