RE: [SLUG] A question of databases

From: wchast@utilpart.com
Date: Fri Apr 09 2004 - 12:29:10 EDT


Ronan Heffernan wrote:
> Maureen wrote:

> OK, I guess it makes sense that street addresses might not be the best
> method for locating cell callers in a largely rural county. Since
> this is what you want, GRASS will pretty much do this automatically.
> The biggest job will be scanning-in and calibrating the map that you
> want to use. You won't need a database (not to support GRASS, you
> might want a database to keep track of calls?)

For history sake you DO want a db, you need to keep those things on
file for the lawyers if there is ever a question about who saw what.

We at first looked at doing some of the smaller AVL stuff with a flat
file or just grabbing the lat/lon data, but it was too big of a issue
with the events history thing. Also a db allows you to link it to all
types of other data that you can display, one of the things that you
will want to know is more data on the provider, and you can link that
to other data so the person watching the screen has it all right there.
 
> To plot a point,
> simply make a text file like the following (plots three of our SLUG
> meetings):
>
> -82.51080 27.97409 Tampa
> -82.78790 28.00103 Dunedin
> -82.32439 27.93889 Brandon
>
> tell GRASS to plot that file. You can zoom/pan using the d.zoom tool
> that is built into GRASS. You can also simplify this stuff by writing
> BASH scripts that execute inside GRASS. How does this data come-in
> from the cell company (FTP, raw TCP/IP, XML, ...)?

Ronan, does GRASS read .shp files? if it does then you are in luck with
the streets there are loads of street data out there in .shp files and
there may be a converter that will convert the TIGRE files to .shp
files. The street name info is carried in the .shp files so when you
plot the streets you will see the names along with the street.

>
> Do you already have a linux machine that you can install GRASS? If
> you need help (telephone or on-site) let me know, but I am only free
> evenings/weekends. In the meantime, I will try to learn how to scan
> and calibrate maps.

Chuck Hast
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