Dear Richard,
Thanks for your question below about MapEdit. I have contacted the
manufacturers who have provided the following:
Only vectors, vector objects are georeferenced (provided with the
geographical coordinates). Usually geo coordinates are provided
before export to the target GIS format. Thus (just to clarify the item)you
can work even w/o any raster - just draw vectors (or import a
vector map), provide geo coordinates to the vector map, and export the
georeferenced vector map.
If speaking about scanned maps (etc.) vectorization - vectors are drawn
(automatically, semiautomatically, or manually) based on the
underlayed raster in relative raster coordinates. When you need to use more
then one raster you can join them using raster refer points that need not be
the georeference points, just be coincident points on rasters being joined.
Providing geocoordinates to the vector map can be performed at any moment of
vectorization process.
If speaking about space / aerial images processing - in this case a special
math methods are used to transform images to
take into consideration the orbital parameters, camera lens parameters,
etc.In this case the vector map should be pre gepreferenced before you begin
space image transformation.
I hope this information is of use, please let me know if you require any
further info and I'll do my best to help.
Regards,
Kirsten Burrows
Channel Manager.
MapCentric Ltd - Independent GIS Distributors
www.mapcentric.co.uk
-----Original Message-----
From: Richard Duncan [mailto:[EMAIL PROTECTED]]
Sent: 15 June 2000 23:00
To: [EMAIL PROTECTED]
Subject: RE: MI Vectorization software
Kirsten:
I am interested in this topic also. If the raster image is already
georeferenced, does the vectorization process honor the referencing and keep
the correct coordinates? Alternatively, if the raster is not georeferenced,
how does one go about doing that and georeferencing the vectorized objects
for GIS.
Thanks,
Richard G. Duncan
GeoEngineers, Inc.
8410 154th. Avenue NE
Redmond, WA 98052
425-861-6000
425-861-6050 (Fax)
http://www.geoengineers.com/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Kirsten Burrows
Sent: Thursday, June 15, 2000 1:59 AM
To: [EMAIL PROTECTED]; 'MapInfo-L'
Subject: RE: MI Vectorization software
Dear Hassan,
You may wish to consider MapEdit distributed by MapCentric. MapEdit is a
powerful map editing tool which creates digital vector maps from scanned
cartographic materials and raster images for on-screen editing.
Product features include:
Automated/Manual digitising
Raster image pre-processing
Improves poor quality raster images
Topological management
Map distortion correction
Automatic edge matching
True colour tracing
Trace speed customising
Import existing vector maps
Aerial and space photos (images) processing
There is a MapEdit demo available from
http://www.mapcentric.co.uk/MapEdit.htm. If you have any problems with the
download, please let me know and I'll e-mail the files to you. The price of
MapEdit is US$695.
I hope this information is of use, please let me know if you require any
further information.
Best Regards,
Kirsten Burrows
Channel Manager.
End of financial year offers - see website for more details
MapCentric - Independent GIS Distributors
Tel +44 20 7242 4535
Fax +44 20 7242 4536
www.mapcentric.co.uk
This email is confidential and should not be used by anyone who is not
the original intended recipient. MapCentric cannot accept liability
for statements made which are clearly the sender's own and not made on
behalf of MapCentric. This email contains information and prices that
may be subject to change at any time. Errors and omissions excepted.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Business Expansion
Sent: 14 June 2000 18:14
To: 'MapInfo-L'
Subject: MI Vectorization software
Dear All,
I am looking for a very professional vectorization software. Price is not an
issue.
I'll appreciate your help on this.
Thank you
Best Regards
Hassan Tazi
Business Expansion S.A.
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