<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small">Lyndz,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">I'm going through some old emails and didn't see a response to this one.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">You were almost there, but in order to mask lat/lon values against one or more shapefile outlines, you must provide a data array that has the lat/lon arrays attached to it.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Since you don't have a data array associated with your lat/lon pairs, you can simply create a dummy array, and then attach the lat/lon to it. For example:</div><div class="gmail_default"><div class="gmail_default"> data1d=asciiread("jma.csv",-1,"float")</div><div class="gmail_default"> shp_filename="Bicol_region.shp"</div><div class="gmail_default"> print_shapefile_info(shp_filename)</div><div class="gmail_default"> lat = data1d(0::2)</div><div class="gmail_default"> lon = data1d(1::2)</div><div class="gmail_default"><br></div><div class="gmail_default">;---Create dummy data array so we can attach lat/lon attributes to it. </div><div class="gmail_default"> npts = dimsizes(lat)</div><div class="gmail_default"> data = new(npts,float)</div><div class="gmail_default"> data@lat1d = lat</div><div class="gmail_default"> data@lon1d = lon</div><div class="gmail_default"><br></div><div class="gmail_default">;---Return a mask array (0s and 1s) indicating which lat/lon pairs fall inside the shapefile region </div><div class="gmail_default"> opt = True</div><div class="gmail_default"> opt@return_mask = True</div><div class="gmail_default"> data_mask = shapefile_mask_data(data,shp_filename,opt)</div><div class="gmail_default"><br></div><div class="gmail_default">I've attached a full script that creates a plot and draws all the lat/lon pairs in red, with the ones inside the shapefile regions (only two of them) in blue.</div><div class="gmail_default"><br></div><div class="gmail_default">--Mary</div><div class="gmail_default"><br></div><div class="gmail_default"><br></div></div><div class="gmail_default" style="font-size:small"><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 13, 2018 at 1:51 AM, Lyndz <span dir="ltr"><<a href="mailto:olagueralyndonmark429@gmail.com" target="_blank">olagueralyndonmark429@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr" class="m_-141422599481284550gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Hello,</div><div><br></div><div>I am trying to filter Tropical Cyclone (TC) lat-lon points from a csv file using a shapefile and display the tracks. </div><div><br></div><div>I'm reading the csv file and shapefile like this:</div><div><br></div><div> data=asciiread("jma.csv",(/<wbr>1519,2/),"float")<br></div><div> load "./shapefile_utils.ncl"</div><div> shp_filename="Bicol_region.<wbr>shp" </div><div> data_mask = shapefile_mask_data(data,shp_<wbr>filename,True)</div><div><div><br></div><div>Error: shapefile_mask_data: Error: not a valid rectilinear, curvilinear, or uns</div><div>tructured grid</div></div><div><br></div><div>I think I am missing a step after reading the csv file. Attached are the shapefile and csv file.</div><div><br></div><div>Any suggestions on how to do this correctly in NCL?</div><div><br></div><div>Sincerely,</div><div><br></div><div>Lyndz</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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