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6.2.3: What public domain or shareware GIS/carto software is available and where is it? (Geographic Information Systems)




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This article is from the Geographic Information Systems FAQ, by Lisa Nyman lnyman@census.gov with numerous contributions by others.

6.2.3: What public domain or shareware GIS/carto software is available and where is it? (Geographic Information Systems)


megatelVISOR 1.51

- Hybrid vector/raster map server for user-written client applications -

megatelVISOR enables the user to perform complex manipulations of
text and graphics data against a map background.

The core of megatelVISOR is a so-called "VIEWER" which allows to
record, store and recall maps (drawings, pictures, charts, etc. )
of any magnitude. The magnitude of the scanned maps is only limited
by mass-storage capability restrictions.

Raster mapping
The map-data input, i.e. the scanning of the graphic mass data
(maps, plans, aerial reconnaissance photos, etc.), can be done by a
standard scanner . The data are then compressed and stored on hard
disk or CD. The handling of the scanning process and the storage is
very simple, so that non-technical users may scan the maps without
difficulties. The stored maps can be accessed from MS-DOS and UNIX
UNIX users of megatelVISOR via network.
megatelVISOR via network.

Vector mapping
megatelVISOR supplies diverse functions for graphic vector editing
on the map (drawing, moving, copy/paste, colouring, hatching etc)
that are provided by standard graphics systems running under
MS-WINDOWS 3.1, NeXTSTEP, OpenStep and X-WINDOWS, Windows NT.

The input for the generation of the vector layers is possible from
the workstations manual I/O facilities (keyboard and mouse) as well
as the import of vector data from ASCII delimited format (DXF and
others).

The vector-management system of megatelVISOR 1.5 consists of a
new geometrical-database, based on a reorganisation-free
v-tree-index procedure that provides a very fast access even when
there is a very high number of vector objects to handle.

Features of the resulting map (basic rastered map plus vector layers)
are configurable from menue, which is adapted and similar to that
of the graphical user interface GUI (e.g. MS-WINDOWS, NeXTSTEP,
MOTIF ) so that non-technical users can perform all editing
functions.

megatelVISOR is a universal front-end for graphical applications.
The VIEWER exchanges messages with other applications via DDE
(MS-WINDOWS VIEWER) TCP/IP and Distributed Objects (UNIX Viewers).
This includes external control of viewing functions, drawing by
other applications as well as editing these (or new) objects in the
VIEWER and sending them to the appropriate application.

The incorporation of data files compatible with ASCII delimited
format is possible. By (Mouse-Click-) adressing a layers graphical
information (i.e. point,polygon or area) the target information of
the database (or the text processor) will be searched and displayed
with all stored attributes. Reversely the results of database
manipulations may be displayed on the layer/map.
Possible applications include technical documentation and land
management systems.

Prices (1Q1996) DM 7800.00 plus VAT.
The program package megatelVISOR consists of several parts.
Item prices in Deutsche Mark (DM) are given without VAT:

 Number of licenses      1       2-9     10 and more
 Viewer          3950    3550    3250
 Toolbox         3950    3550    3250

Additional DXF-Interface DM 230.
You only need the toolbox if you want to generate maps from scans.

Please address project specific questions to

megatelVISOR-Team
R. Gath, Dr. H. Bischoff

email: info@megatel.de
megatel GmbH
Wiener Strasse 3, D-28359 Bremen, Germany
Tel. ++49 421 22095-0 , Fax ++ 49 421 22095-16

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GMT

GMT (generic mapping tool) by Paul Wessel, School of Ocean and Earth
Sciences and Technology (SOEST) / University of Hawaii can

- display various kinds of fancy maps (Postscript from formatted ascii
data)
- apply diverse analyses (fits, contours, fft, etc) on the data
- transform to many coordinate systems
- run in connection with NetCDF
- be used in connection with own routines

more info can be got from reading the (thick) manual.

GMT documentation & sources: anonymous ftp from kiawe.soest.hawaii.edu
(128.171.151.16). in the pub/gmt directory

GMT uses several functions in the netCDF library. Copy the file
netcdf.tar.Z from unidata.ucar.edu (128.117.140.3) using anonymous ftp.
Then uncompress/tar and follow their instructions for installation.
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