[Qgis-user] How to downscale shapefile data

[francesco.maicu at ve.ismar.cnr.it]

  Sorry to have not inserted the topic.
It was just a mistake ...I wad adding  +to_meter=0.01  , instead of
substituting.
Sorry

Quoting Andre Joost <andre+joost at nurfuerspam.de>:

> Dear Francesco,
>
> please use a meaningful topic so that others can search for it.
>
> Am 06.07.2015 um 10:50 schrieb francesco.maicu at ve.ismar.cnr.it:
>> Dear all,
>> I have a shape file tha for a certain reason has wrong coordinates.
>> The areal geometry data originally come from a dgn file with EPSG3004
>> coordinates, but now as I edited and exported from Geomedia, they have
>> been
>> multiplied for a factor 100, ie the exported shape has coordiantes
>> 100times
>> greater than real ones.
>> How can I go back (re-translate) to EPSG3004 coordinates?
>> I saved a custom CRS ading to EPSG3004 string,the keyword
>> +to_meter=0.01 ,
>> but it doesn't work.
>
> EPSG:3004 is defined as:
>
> +proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=2520000 +y_0=0 +ellps=intl
> +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +units=m +no_defs
>
> If you want to change the units, you have to replace the +units=m part
> with +to_meter=0.01:
>
> cs2cs +proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=2520000 +y_0=0
> +ellps=intl +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68
> +to_meter=0.01 +no_defs +to +init=epsg:3004 <in.csv >out.txt
>
> in.csv:
> 250000000 450000000
>
> out.txt:
> 2500000.00        4500000.00 0.00
>
> HTH,
> André Joost
>
> _______________________________________________
> Qgis-user mailing list
>
Qgis-user at lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/qgis-user
-- 
Francesco Maicu
ISMAR - CNR
Arsenale Tesa 104 - CASTELLO 2737/E
30122 Venezia
Italy

tel.  +39 041 2407944
fax   +39 041 5207940
e-mail: francesco.maicu at ve.ismar.cnr.it
skype: checcomex
---------------------------------
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20150706/9e2697cf/attachment.html>