MAPGEN

[Linda Bragg x6451]

Nancy Gardner has posed the following questions.
Please respond to her at the following:
email: ngardner at ncrds.er.usgs.gov
phone: 703-648-6439


Our version of Mapgen4.1 will not work when we
are using a Latitude and Longitude Projection.

We have an independant version of mapgen (written by Jerry
Evenden) which will create map.def's and overlays in the
Equidistant Cylindrical Projection, which is the projection
that lat-long option actually uses. Does the interface version
of mapgen have this capability? 

The following text demonstrates the process going into the
interface.

When setting up the location we responded to
the question concerning ellipsoid as sphere.
This is what the DEFAULT_WIND looks like:
rncrds0:34> more DEFAULT_WIND
proj:       3
zone:       0
north:      33N
south:      32:52:30N
east:       92:45W
west:       92:52:30W
cols:       2500
rows:       2813
e-w resol:  0:00:00.18
n-s resol:  0:00:00.159972

Creating PROJ_INFO & PROJ_UNITS with
g.setproj works fine, here are the PROJ_INFO & PROJ_UNITS file:

rncrds0:35> more PROJ_INFO
name: Latitude-Longitude
proj: ll
ellps: sphere

rncrds0:36> more PROJ_UNITS
unit: degree
units: degrees
meters: 1.0

When going to mapgen for the first time with
An error occurs, which allows us to go no furthur:

The PROJ_INFO file for Location <long_lat_test> 
is not in the correct format.
Please run the command g.setproj from the PERMANENT mapset.
EXITING ..........................................

Is it possible that our errors come from the way the software
was loaded onto our system?


We would also like to know if there is a driver for either
the Calcomp 1044 or the Calcomp 5800 Series Plotters for 
mapgen4.1 .

         Thanks, 

	 Nancy