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Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Mark -- I don't know of any convention for polylines, but two other ideas come to mind: 1. use "track files" (see, for example: <http://geon.unavco.org/unavco/IDV_datasource_track.html#a> might work... 2. another approach would be to use the "shape" drawing that is built into the IDV (although this is another, separate file). You would use the drawing tool and "File->import". An example file, with two lines in lat-lon coordinates: <shapes> <polygon color="255,0,0" coordtype="LATLON" filled="false" fulllatlon="false" linewidth="1.0" name="Glyph 1" pickable="true" points="45.343544,-90.18899,45.311947,-90.12044,45.264553,-90.00653,45.264553,-89.96164,45.248753,-89.93868,45.185562,-89.75733,45.027576,-89.43984,44.980183,-89.30474,44.88539,-89.14668,44.759007,-88.87743,44.72741,-88.83254,44.64842,-88.6095,44.632618,-88.56496,44.60102,-88.498146,44.585224,-88.47586,44.569427,-88.43141,44.553627,-88.40915,44.553627,-88.38698,44.427242,-88.209404,44.41144,-88.165146,44.316654,-88.0105" smooth="true" zposition="-0.995"/> <polygon color="255,0,0" coordtype="LATLON" filled="false" fulllatlon="false" linewidth="1.0" name="Glyph 2" pickable="true" points="43.921696,-88.05504,43.921696,-88.07697,43.96909,-88.25255,44.079678,-88.60468,44.12707,-88.78115,44.190266,-89.002205,44.221863,-89.1129,44.23766,-89.13522,44.23766,-89.15727,44.25346,-89.223724,44.25346,-89.24578,44.25346,-89.26784,44.269257,-89.290215,44.300854,-89.37914,44.300854,-89.401215,44.316654,-89.445724,44.33245,-89.46817,44.33245,-89.512344,44.348248,-89.512726,44.364048,-89.5573,44.364048,-89.57939,44.364048,-89.601494,44.379845,-89.624,44.395645,-89.668625,44.458836,-89.803116,44.506233,-89.93741,44.52203,-89.982216,44.553627,-90.02757,44.553627,-90.04974,44.569427,-90.09462,44.569427,-90.1168,44.585224,-90.11734,44.585224,-90.13953,44.61682,-90.273796,44.64842,-90.34159,44.64842,-90.3638,44.664215,-90.38662,44.664215,-90.40884,44.664215,-90.431046,44.680016,-90.43168,44.695812,-90.47676" smooth="true" zposition="-0.995"/> </shapes> tom On Wed, Jun 22, 2011 at 2:54 PM, Mark Zimmerman <mark.zimmerman@xxxxxxx> wrote: > Greetings: > > I have a 2D gridded data set that I am storing in a NetCDF file and > which I have successfully rendered in IDV. Associated with this data > set are several polylines which must be rendered in the view as well. > So far, I have managed to do this by writing them to writing them to > shapefiles which can be read into IDV. It would be less cumbersome if > I could write the polyline data into the same NetCDF file that > contains the gridded data but I have not yet stumbled upon a > convention that will coerce IDV to recognize the data. > > I tried this (and failed): > > dimensions: > tdim = 361 ; > ... others ... > variables: > double tlat(tdim) ; > tlat:long_name = "latitude" ; > tlat:units = "degrees_north" ; > tlat:axis = "Y" ; > tlat:standard_name = "latitude" ; > double tlon(tdim) ; > tlon:long_name = "longitude" ; > tlon:units = "degrees_east" ; > tlon:axis = "X" ; > tlon:standard_name = "longitude" ; > double term(tdim) ; > term:long_name = "Terminator" ; > term:units = "km" ; > term:coordinates = "tlon tlat" ; > ... others ... > > (term is just a dummy array containing zeroes) > > So, is there a convention for storing simple polylines in NetCDF > files? > > Thanks, > -- Mark > > _______________________________________________ > idvusers mailing list > idvusers@xxxxxxxxxxxxxxxx > For list information, to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > -- Tom Whittaker University of Wisconsin-Madison Space Science & Engineering Center (SSEC) Cooperative Institute for Meteorological Satellite Studies (CIMSS) 1225 W. Dayton Street Madison, WI 53706 USA ph: +1 608 262 2759
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