map digitization

Hello,

I am student of BS(IT) and doing my final project on tracking and MIS
system ,to display the position on map i want to use the Longitude /
Latitude coordinate system.I have scanned the map it has longitude and
latitude lines on it I want to digitize it such that it look like
google maps and i could use it in vb.net any help in this regard is
needed can any body tell me how to digitize it and then track
coordinates on to it

thanking in advance

undertakerthedeadman@gmail.com wrote:
Hello

What do you mean by 'digitize the map'. Do you want to have the line
elements as they appear on your scanned image? If so, you need a raster
to vector conversion. Examples of this can be found at
http://www.wintopo.com/ or at http://www.ablesw.com/r2v/

Or, do you want to have a coordinate system attached to your image, so
that you can map your coordinates on it. In that case, you need to
georeference your image (image rectification). In this process, you
create a so-called worldfile which contains the real-world coordinates
of the corner points of your image. From here, using a mathematical
relation, each location in your image can be converted to a real-world
coordinate and vise versa. Again, several tools can help you, see for
example http://www.tatukgis.com/products/AIC/aic.aspx

Hope this helps

Willem


Willem van Deursen, The Netherlands
wvandeursen_nospam@nospam_carthago.nl
replace _nospam@nospam_ for @ to get a valid email address
www.carthago.nl

On Mar 29, 10:07 pm, "undertakerthedead...@gmail.com"

Try QGIS. (qgis.org ) It's free and open-source.

You first need to 'georeference' the scanned map. This should be
straightforward as you will have coordinate information on the paper
map. Then use the QGIS tools for digitizing ( i.e. tracing the roads
on top of the scanned map ). The QGIS manual (
http://download.qgis.org/doc/userguide.pdf
) will guide you through the process.

Now you have digital data ( i.e. a shapefile ) of roads or other
features digitized from the image. You can use the free and open-
source Mapwindow ActiveX control (http://www.mapwindow.com/
mapwingis.php) to access this data from VB.

-Ujaval Gandhi
http://gisindia.blogspot.com

(http://download.qgis.org/doc/userguide.pdf

Hello bro I m not getting how to load the raster map in QGIS any help
on this and further on tiling like google

On Apr 8, 3:09 pm, "undertakerthedead...@gmail.com"
check instructions from here... let me know if you have questions.
make sure you are using QGIS 0.8

http://spatialthoughts.com/ossexamples/2007/02/digitizing-raster-data.html

-Ujaval

(http://download.qgis.org/doc/userguide.pdf