Here's a free utility for determining into which state plane zone an area
falls (you select the county and state, it gives you the zone#)
http://www.mentorsoftwareinc.com/freebie/FREE0599.HTM
Here are GIF maps for all the State Plane zones in the US.
http://www.mentorsoftwareinc.com/RESOURCE/stplane.htm
Here is the GIF map for just the 2 Ohio region state plane zones.
http://www.mentorsoftwareinc.com/images/Imagedir/stplane9.gif
PS: I also noticed that all the files I saw on this ftp site have the zone
number in the filename itself to make identifying which zone they fall into
a little easier.
The site does not appear to state whether this State Plane coordinate
system is using NAD83 or NAD27 datum, and also does not appear to say
whether units
are expressed in meters or survey feet.
MapInfo Pro provides all three state plane zone definitions commonly used,
so if you haven't already, you should find out which Datum (NAD27 or NAD83)
is used, and what units also are used for these DOQQ's to be registered
correctly in the Ohio State plane system.
NAD83 in meters or Survey Feet:
"Ohio 3401, Northern Zone (1983, US Survey feet)", 3, 74, 8, -82.5,
39.67, 40.43, 41.7, 1968500, 0
"Ohio 3402, Southern Zone (1983, US Survey feet)", 3, 74, 8, -82.5, 38,
38.73, 40.03, 1968500, 0
"Ohio 3401, Northern Zone (1983, meters)\p32122", 3, 74, 7, -82.5,
39.67, 40.43, 41.7, 60, 0
"Ohio 3402, Southern Zone (1983, meters)\p32123", 3, 74, 7, -82.5, 38,
38.73, 40.03, 60, 0
NAD27 in Survey Feet:
"Ohio 3401, Northern Zone (1927)\p32022", 3, 62, 8, -82.5, 39.67,
40.43, 41.7, 200, 0
"Ohio 3402, Southern Zone (1927)\p32023", 3, 62, 8, -82.5, 38,
38.73, 40.03, 200, 0
There is also a shareware utility from Rich Greenwood of Greenwood Mapping
that takes the accompanying *.SDW (world file) for the *.sid image and
writes out the MapInfo *.tab file with the projection information needed to
register it automatically provided you know the above coordinate system
used.
I found this utility here:
http://www.greenwoodMap.com/FreeSoftware.htm
Regards,
-Bill
Mail List:[EMAIL PROTECTED]
From: "LEPAGE, MIKE (MIKE)" <[EMAIL PROTECTED]> on
08/07/2000 11:05 AM CST
To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
cc:
Subject: MI ohio state plane divisions
Listers,
I am retrieving some quad level data for Ohio, and it is listed as "ohio
state plane" projection. My problem is that mapinfo has a north and a
south
zone for projection parameters. Can anyone tell me where the division is
for the north and south in Ohio?
data is DOQQ quads in MRsid format from
http://www.geodata.state.oh.us/doqq/index.htm.
I tried contacting them but I am getting no response
thanks,
Mike Lepage, B.Sc.
Senior RF Engineer / Project Manager
Wireless Professional Services
Tel: 636-891-2130
Fax: 636-891-4555
email: [EMAIL PROTECTED]
> Lucent Technologies O
>
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