<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi, Mike — <div>This file is tempting, but even if you could build a PDEF file, interpolating this super high-res data on the fly for every display would be intolerably slow. Better to (1) interpolate outside of GrADS and create a compressed netcdf file on a rectilinear grid, or (2) use another tool to look at this data.</div><div>—Jennifer</div><div><br><div><div>On Jul 24, 2015, at 2:00 AM, Mike Manning <<a href="mailto:michael@bsch.com.au">michael@bsch.com.au</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div lang="EN-AU" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal">Hi all,<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I’m trying to display a Himawari-8 NetCDF file in Grads – here are the attributes of the nc file:<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">dimensions:<o:p></o:p></p><p class="MsoNormal"> time = UNLIMITED ; // (1 currently)<o:p></o:p></p><p class="MsoNormal"> y = 22000 ;<o:p></o:p></p><p class="MsoNormal"> x = 22000 ;<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">variables:<o:p></o:p></p><p class="MsoNormal"> double time(time) ;<o:p></o:p></p><p class="MsoNormal"> time:coordinates = "time" ;<o:p></o:p></p><p class="MsoNormal"> time:long_name = "time" ;<o:p></o:p></p><p class="MsoNormal"> time:standard_name = "time" ;<o:p></o:p></p><p class="MsoNormal"> time:units = "seconds since 1970-01-01 00:00:00" ;<o:p></o:p></p><p class="MsoNormal"> time:calendar = "standard" ;<o:p></o:p></p><p class="MsoNormal"> time:axis = "T" ;<o:p></o:p></p><p class="MsoNormal"> time:unlimited = "True" ;<o:p></o:p></p><p class="MsoNormal"> double y(y) ;<o:p></o:p></p><p class="MsoNormal"> y:coordinates = "y" ;<o:p></o:p></p><p class="MsoNormal"> y:long_name = "projection_y_coordinate" ;<o:p></o:p></p><p class="MsoNormal"> y:standard_name = "projection_y_coordinate" ;<o:p></o:p></p><p class="MsoNormal"> y:units = "m" ;<o:p></o:p></p><p class="MsoNormal"> y:axis = "Y" ;<o:p></o:p></p><p class="MsoNormal"> double x(x) ;<o:p></o:p></p><p class="MsoNormal"> x:coordinates = "x" ;<o:p></o:p></p><p class="MsoNormal"> x:long_name = "projection_x_coordinate" ;<o:p></o:p></p><p class="MsoNormal"> x:standard_name = "projection_x_coordinate" ;<o:p></o:p></p><p class="MsoNormal"> x:units = "m" ;<o:p></o:p></p><p class="MsoNormal"> x:axis = "X" ;<o:p></o:p></p><p class="MsoNormal"> float geostationary ;<o:p></o:p></p><p class="MsoNormal"> geostationary:proj4 = "+proj=geos +lon_0=140.7 +h=35785863 +x_0=0 +y_0=0 +a=6378137 +b=6356752.3 +units=m +no_defs " ;<o:p></o:p></p><p class="MsoNormal"> geostationary:proj_name = "GEOS141" ;<o:p></o:p></p><p class="MsoNormal"> geostationary:grid_mapping_name = "geostationary" ;<o:p></o:p></p><p class="MsoNormal"> geostationary:longitude_of_projection_origin = 140.7 ;<o:p></o:p></p><p class="MsoNormal"> geostationary:perspective_point_height = 35785863. ;<o:p></o:p></p><p class="MsoNormal"> geostationary:satellite_height = 35785863. ;<o:p></o:p></p><p class="MsoNormal"> geostationary:semi_major_axis = 6378137. ;<o:p></o:p></p><p class="MsoNormal"> geostationary:semi_minor_axis = 6356752.3 ;<o:p></o:p></p><p class="MsoNormal"> geostationary:sweep_angle_axis = "y" ;<o:p></o:p></p><p class="MsoNormal"> geostationary:GeoTransform = -5500000., 500., 0., 5500000., 0., -500. ;<o:p></o:p></p><p class="MsoNormal"> geostationary:spatial_ref = "PROJCS[\"unnamed\",GEOGCS[\"unnamed ellipse\",DATUM[\"unknown\",SPHEROID[\"unnamed\",6378137,298.2570248822722]],PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433]],PROJECTION[\"Geostationary_Satellite\"],PARAMETER[\"central_meridian\",140.7],PARAMETER[\"satellite_height\",35785863],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0]]" ;<o:p></o:p></p><p class="MsoNormal"> double scan_line_time(y) ;<o:p></o:p></p><p class="MsoNormal"> scan_line_time:units = "seconds since 2015-07-14 03:00:00" ;<o:p></o:p></p><p class="MsoNormal"> scan_line_time:long_name = "estimated scan line time" ;<o:p></o:p></p><p class="MsoNormal"> scan_line_time:calendar = "standard" ;<o:p></o:p></p><p class="MsoNormal"> scan_line_time:coordinates = "y" ;<o:p></o:p></p><p class="MsoNormal"> float channel_0003_brf(time, y, x) ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:_FillValue = 1.e+20f ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:least_significant_digit = 2s ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:algorithm_name = "channel_3_brf" ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:central_wavelength = 6.3915e-07 ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:comment = "bidirectional reflectance factor observed by the Advanced Himawari Imager at 0.64 um (Band 3)" ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:long_name = "bidirectional reflectance factor for channel 3 at 0.64 um" ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:units = "1" ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:valid_max = 1.2 ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:valid_min = 0. ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:coordinates = "time y x" ;<o:p></o:p></p><p class="MsoNormal"> channel_0003_brf:grid_mapping = "geostationary" ;<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I made a sample script as follows:<o:p></o:p></p><p class="MsoNormal">'sdfopen testfile.nc'<o:p></o:p></p><p class="MsoNormal">'d channel_0003_br'<o:p></o:p></p><p class="MsoNormal">'printim satimage.png'<o:p></o:p></p><p class="MsoNormal">'quit'<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Ideally I want to be able to set a lat/lon region, but when I specify any lat/lon region I just get a chart with a red output. When I don’t specify any lat/lon output at all, I get a bizzare chart (I’m guessing because it’s using x and y coordinates instead of lat/lon?) Is there any way to correctly get this to display in grads at all?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Cheers, Mike<o:p></o:p></p></div></div><span><sat1.png></span>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>http://gradsusr.org/mailman/listinfo/gradsusr<br></blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>--</div><div>Jennifer M. Adams<br>Center for Ocean-Land-Atmosphere Studies (COLA)<br>111 Research Hall, Mail Stop 2B3<br>George Mason University<br>4400 University Drive<br>Fairfax, VA 22030 <br><br></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span></span><br class="Apple-interchange-newline">
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