Hello Lars,
Thank you for you suggestion. I'll have to try it. But there is another
problem I would have. The points are to disperse. Where at the thematic
map interpolates from the point data to get a more accurate depth reading.
Is there a way where I can create a more concentrated points and have the
value for that point at that location populated with what the thematic
layer reads/interpolates as the depth value?
Thank you much,
Rick
PS using MI 7.0 on Windows2000.
"Lars V. Nielsen,
GisPro"
<[EMAIL PROTECTED]> To
"Rick Luangkhot"
10/15/2003 03:16 <[EMAIL PROTECTED]>
PM cc
<[EMAIL PROTECTED]>
Subject
Please respond to Re: MI-L Statistic on Thematic
"Lars V. Nielsen, layer
GisPro"
<[EMAIL PROTECTED]>
Hi Rick,
First you add an id to all point layer records depending on which polygon
each belong to. This id must be unique, and can be added
to the polygon layer using ROWID if necessary. It's transferred to the
point layer table by a join that specifies point.OBJ within
polygon.OBJ.
You then issue a select statement on the point layer table, querying for
Min(depth), Max(depth) and Avg(depth), grouping the result
by the polygon id.
This result can be transferred back to the polygon layer by joining on the
polygon id. You probably have to save and re-open the
grouped query first, but then it'll work.
Best regards/Med venlig hilsen
Lars V. Nielsen
GisPro, Denmark
http://www.gispro.dk/
http://www.gispro.biz/
----- Original Message -----
From: "Rick Luangkhot" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, October 15, 2003 9:10 PM
Subject: MI-L Statistic on Thematic layer
>
>
>
>
> Hello Listers,
>
> I have point data that has water depth values. I created a thematic map
> from these points. I have polygons that I would like to populate with
the
> values of max, min and medium of what is from the thematic map for each
> enclosed polygons.
>
> Is there any way to do this?
>
> Thanks in advance,
>
> Rick
>
>
> ---------------------------------------------------------------------
> List hosting provided by Directions Magazine | www.directionsmag.com |
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
> Message number: 8746
>
>
---------------------------------------------------------------------
List hosting provided by Directions Magazine | www.directionsmag.com |
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Message number: 8749
