I’m planning to use GRASS but I have one question about location/mapset organization.
I’m going to do some classification and image processing for a certain region of Spain at 3 different levels: local, regional and national. This different scales have different scale definition with higher scale definition for local and lower for national (1:1000000). I will use different satellite images for different scales but some vectorial (e.g. roads) will be used for all three scales. National scale includes all country, regional only a certain region and local (a specific and very small area).
According to GRASS database and common structure I will store my data at a GISDBASE. Within this directory, GRASS GIS data are organized by projects. Since its location is defined by its coordinate system, map projection and geographic boundaries my question is: Should I have a different location for each scale? I would say so, right? If that is the case, I would define mapsets as different data sources or produced maps.
On Fri, Nov 27, 2009 at 5:07 PM, Luis Lisboa <luislisboa1975@gmail.com> wrote:
Hello people
I'm planning to use GRASS but I have one question about location/mapset
organization.
I'm going to do some classification and image processing for a certain
region of Spain at 3 different levels: local, regional and national. This
different scales have different scale definition with higher scale
definition for local and lower for national (1:1000000). I will use
different satellite images for different scales but some vectorial (e.g.
roads) will be used for all three scales. National scale includes all
country, regional only a certain region and local (a specific and very small
area).
According to GRASS database and common structure I will store my data at a
GISDBASE.
Yes.
Within this directory, GRASS GIS data are organized by projects.
Right (project = "location").
Since its location is defined by its coordinate system, map projection and
geographic boundaries my question is: Should I have a different location for
each scale? I would say so, right? If that is the case, I would define
mapsets as different data sources or produced maps.
If the coordinate system/map projection is the same I would create
one location and have inside one or several mapsets.
That's all. To use different locations in this case would overly complicate
things.