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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | GISList: Surfer question |
| Date: |
01/30/2003 03:11:25 PM |
| From: |
Rick Gray |
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Hi list,
I posted a question to the list a few days ago but never saw it and
never got a response. I will rephrase and expand on it.
I am experimenting with Surfer from Golden Software (I have not found
a surfer-l to ask this question on). I have used it for interpolation
of data quite a bit and like its versatility. I have never gone
beyond the simple interpolation stage. Here is my problem:
I have very detailed, township-level maps, water bodies, roads, etc.
all in Shapefile format. I need to interpolate my point data but only
show the results over the land portion of specified counties. I
understand that in Surfer you use a "blanking" file to cover the part
of the interpolated map you do not want to see. How do I generate the
appropriate blanking maps at the appropriate scales? When I import
the different shapefiles directly, they do not align properly. I want
to create a map with water as solid blue, township boundaries as
black lines, etc. and the interpolated data in the "background".
I suspect this is something simple that I have overlooked in the on-
line help. Are there any Surfer gurus out there that can advise me?
Eventually I need to automate this process to read the data from a
database, generate the maps, then export jpg's to a file where they
can be posted to the web. But first I have to build a prototype
before I can fly the real thing.
Thanks
rg
Rick Gray
GIS Specialist, Ontario Weather Network
http://www.ownweb.ca
Liaison, GIS Post Diploma Certificate Program
Ridgetown College, University of Guelph
http://www.ridgetowncollege.com/
Tel. 519-674-1554
E-mail: rgray@ridgetownc.uoguelph.ca
Ridgetown: -81.883 W, 42.450 N
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