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<p class="MsoNormal">Hi guys,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m brand new to NCL as I need to quickly use it to convert a shapefile to a netcdf file. The idea is to create a mask of marine protected areas included in the shapefile. I’ve tried using the following code but as I’ve highlighted in the
code I run into some issues...</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">load "shapefile_utils.ncl"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">shpname = "ospar_polygon_wdpa_simplified.shp"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">maskname = "MPA_Mask.nc"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">print_shapefile_info(shpname)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">f = addfile("SST1.nc","r")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">var = f->time(0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">var@lat2d = f->LAT<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">var@lon2d = f->LON<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">opt = True<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">opt@return_mask = True
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">mask_array = shapefile_mask_data(var, shpname, opt)
<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">mask_array!0 = "y"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">mask_array!1 = "x"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">mask_array@coordinates = "LAT LON"
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">system("rm -f " + maskname)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">fout = addfile(maskname,"c")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">fout->mask_array = mask_array<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">fout->LAT = f->LAT<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">fout->LON = f->LON<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA"><o:p> </o:p></span></p>
<p class="MsoNormal">Unfortunately I get the following error message halfway through:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">mask_array = shapefile_mask_data(var, shpname, opt)
<b><o:p></o:p></b></span></p>
<div>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">(0) shapefile_mask_data: Error: not a valid rectilinear, curvilinear, or uns<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Consolas;color:#333333;background:#FAFAFA">tructured grid</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have any ideas as to why this happens? I’ve attached the relevant data to this email (hoping that it will send through).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Josh<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows 10</p>
<p class="MsoNormal"><o:p> </o:p></p>
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