Puneet,
1. If the incoming CSV format and content is consistent then using OGR
would likely be OK. If you need to modify the values to make it
acceptable to Mapserver (e.g. change your angles from Heading
(clockwise, north is 0) to "standard" angles (counter-clockwise, + x
axis is 0), the PostGIS would be a better solution. Note that RFC 64
may solve the heading angle problem by allowing you to do the math in
the mapfile, but I haven't tried it. Also you may want to test both
CSV/OGR and PostGIS solutions for performance reasons.
2. There are a couple of vector( Type vector, not TrueType) arrow
symbols described at the bottom of
http://mapserver.org/mapfile/symbology/construction.html
Best Regards,
Brent Fraser
On 9/20/2011 10:57 PM, Mr. Puneet Kishor wrote:
I have just finished reading the following thread
Mapserver - User - How to display vector symbols (direction and magnitude) in
MapServer?
http://osgeo-org.1803224.n2.nabble.com/How-to-display-vector-symbols-direction-and-magnitude-in-MapServer-td1971531.html
Two questions --
1. What is the most efficient way to display vector data that comes to me on a
daily basis as text files. I have x,y, length and angle information in these
text files (along with some other info). I guess, I will have to massage the
files to convert them to clean CSV with only the first line containing the
column names. Then I can access the file as an OGRVRTDataSource. Or, should I
insert the data in a Pg table and then use that? The files will be refreshed
daily, so the processing needs to be done only once a day.
2. The thread above makes a mention of a Mapfile CLASS definition like so
CLASS
SYMBOL 'arrow'
ANGLE [Rate]
SIZE [Az]
COLOR 0 0 0
END
Is there an arrow symbol definition that I can use, or is that only possible
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