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<DIV><FONT face=Arial size=2>Hi Everybody,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have a general question for my own education, it
doesn't directly pertain to anything I'm working on right now.
I was just wondering if anybody could explain to me the difference in different
ways of tiling map images? In my current project, I had
several large layers such as road layers and water layers that I tiled in order
to make them faster and more resource friendly... The method I used
was:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>-tile4ms <data.txt> <tile
name> </FONT></DIV>
<DIV><FONT face=Arial size=2>(where data.txt is a list of all the shapefiles
being included in the tiling, since tiger data comes in about a zillion
files)</FONT></DIV>
<DIV><FONT face=Arial size=2>-shptree <tile name></FONT></DIV>
<DIV><FONT face=Arial size=2>-cat <data.txt> | xargs -n 1
shptree</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The way I understand it, this combines all the
pieces into one shapefile, tiles them, and spatially indexes them... is
that correct? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>In a recent post I also saw a pointer to Steve
Woodbridge's shp2tile utility which it seems does much the same thing... the
main difference being from the sounds of it that it doesn't put a lot of
shapefiles together, but rather splits a single large shapefile into tiles and
then indexes them. How is this different from the first method, and
how does it affect resources and rendering speed? Or is the only
real difference the one I noted where you are sticking multiple shapefiles
together one way and only using one original shapefile the other
way?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Are there other methods of tiling that behave
differently or that you might use for different situations?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks everybody,</FONT></DIV>
<DIV><FONT face=Arial size=2>Jeff</FONT></DIV>
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