plot density on map

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著者: David A. Sinck
日付:  
新しいトピック: Mandrake 9.1 from PLUG CD Service
題目: plot density on map

\_ SMTP quoth Kevin Brown on 3/24/2003 19:05 as having spake thusly:
\_
\_ Mike Starke wrote:
\_ > I am wondering if anyone can direct me to either
\_ > some software or a web site that functions much
\_ > like http://maps.yahoo.com
\_ >
\_ > I would like to query my database for the address and zip,
\_ > and have it plot a 'dot' on a valley map (or map for any city)
\_ > for each entry.
\_
\_ Only programs that I can think of that do this are commercial products (not
\_ F/OS). Some of the data they use is free from the Census bureau (Tiger data in
\_ the US), but only covers the US and just shows how streets interconnect, don't
\_ think is shows gps data.

One of the map services used to provide long/lat. Pin down the
corners of your map and do linear interpolation.

YMMV.

David