Troy,
It may take a little processing time but if you create a buffer
(one shape for all objects) of your city streets with a very
small offset
then you will have a shape that you can use to cut the graphics
out of the county file. As long as you do not break segments
your
data should stay okay. As you noted, the exact match is very
tough.
Should you have an error during the create buffer (which I get
with some large tables) then you need to write a little mapbasic
loop
that cycles through the table creating individual buffers (run it
during lunch) which you can manually combine.
so long for now...
"Troy Wiora" <[EMAIL PROTECTED]>@lists.directionsmag.com on
10/03/2000 04:27:17 PM
Please respond to "Troy Wiora" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
cc:
Subject: MI-L Combining Data
I have a file containing all of the streets for a county and a
file containing
all of the streets in a city within this county. I need to
create a polygon
around the city file, without manually drawing it in, delete the
data from the
county file inside this polygon and paste the city data back in?
I have already
made all the column names match up and once I have the polygon,
the rest should
be easy. Right? The nodes do not have to match exactly and some
overlap is OK.
For my select statement I will only select segments that are
entirely within the
polygon. Also, as a side note, one file is "NAD27 for
continental US" and the
city file projection is "Not on file", whatever that means. On
screen the two
files line up very nicely.
Thanks if you can help me out,
Troy
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