[Proj] cs2cs usage

andrea antonello andrea.antonello at gmail.com
Thu Mar 20 09:33:36 EDT 2008

> I read cs2cs manual page, but I still have big doubts about it! quickly:
> 0. Preamble: I built PROJ.4 4.6 on windows using MinGW
> 1. Question 1: when I launch cs2cs from command line it executes the
> requested operation and then waits for others inputs... how can I quit,
> without the need of killing the process in task manager?

I'm not sure about that. How do you execute it?

> 2. Question 2: I need to trasform single points from WGS84 (EPSG ID = 4326)
> to Gauss-Boaga Roma40 West (EPSG ID = 3003)
> while ID=4326 determinates an univocal datum, to correctly define
> Gauss-Boaga Roma40 West I need to specify also +towgs84 parameters,
> retrieved by GRASS (creating a new location in GRASS using 3003 EPSG code,
> it asks for furthers options, suggesting the correct parameters to set):
> the complete datum definition for Gauss-Boaga Roma40 West is as follows
> (from GRASS):
> EPSG ID = 3003
> Option 2
> Used in Italy (Peninsular Part)
> towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68
> Accuracy 3-4m
> how can I use cs2cs respecting the previous parameters?
> I tried with cs2cs +init=epsg:4326 +to +init=epsg:3003
> but I don't know how to set towgs84 parameters (and even if they are needed)

I guess they are very needed. Did you try to add  +towgs84=<your
commaseparated values> ?


> Thanks fo help
> Marco
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