[GRASSLIST:8966] Re: GRASS 6 in a nutshell tutorial

[Ian MacMillan]

Luigi, glad that you mostly got things to work.  Good to know that 
there are alternate sources of data.  I am not sure, but I would guess 
that you are using a UTM projection.  I bet that the vector is using 
one zone, and the DEM is using another.  Make sure that you import them 
into their true projection, then reproject the data as you see fit (I 
would reproject the vector to save time).

Just for completeness, I think GRASS can import e00 vectors without too 
much trouble with v.in.e00.

-Ian



On Nov 9, 2005, at 11:10 AM, Luigi Ponti wrote:

> Thanks Ian,
>
> I got the vector .shp outline of the state from the California Spatial 
> Information Library http://gis.ca.gov/index.epl since the one you 
> recemmended me on http://data.geocomm.com/ was in .e00 format and 
> GRASS would not import it directly.
>
> The DEM I got it from NOAA/GLOBE 
> http://www.ngdc.noaa.gov/mgg/topo/globe.html where you can customize 
> your download area as opposed to the DEM on http://seamless.usgs.gov 
> that has to be downloaded in small pieces.
>
> I have imported both the vector and the raster with minimum trouble, 
> since the first has a .prj file which GRASS recognized, and the second 
> had a detailed import tutorial in the cygwin-GRASS install page. 
> However, despite the fact the the two layers supposedly have the same 
> NAD83 projection info (I did not enter anything manually), when I try 
> to display them together on a GRASS monitor, the state layout is in 
> the middle of the ocean compared to the elevation raster.
>
> Is there a way to overlap the two layers or to chek for a coordinate 
> error?
>
> Thanks,
>
> Luigi
>
> Ian MacMillan wrote:
>
>> Luigi, I am not sure about your manual problems, but you can grab 
>> data  of California from several location for free.  Try  
>> http://data.geocomm.com/ for a vector outline of the state.  You have 
>>  to create an account on that site, but it is free, and they have a 
>> lot  of useful data.
>>
>> The best DEM of the state can be had from the USGS seamless server  
>> here: http://seamless.usgs.gov.  DEMs of a variety of resolutions are 
>>  available there.
>>
>> If you have already imported data and can't view it, have you made 
>> sure  to set your region?
>> g.region rast=your_rast
>> or
>> g.region vect=your_vect
>> then
>> d.rast rast=your_rast
>>
>> Hope this helps,
>> Ian
>>
>>
>> On Nov 3, 2005, at 3:58 PM, Luigi Ponti wrote:
>>
>>> Markus Neteler wrote:
>>>
>>>> Luigi Ponti wrote:
>>>>
>>>>
>>>>> Hi there,
>>>>>
>>>>> while going through the Neteler's GRASS 6 in a nutshell tutorial I 
>>>>>  get
>>>>> the message:
>>>>>
>>>>> "Cannot open database
>>>>> /home/Administrator/grassdata/spearfish60/user1/dbf/ by driver dbf"
>>>>>
>>>>> when at section 3.1.2. I try to import vector ESRI SHAPE files form
>>>>> the package tiger2000_UTM13_nad27.tar.gz, via the "import various
>>>>> formats using ogr" option in the GIS manager.
>>>>>
>>>>> Does anybody know what the problem could be?
>>>>>
>>>>> Thanks,
>>>>>
>>>>>
>>>> Luigi,
>>>>
>>>> please check if the directory
>>>> /home/Administrator/grassdata/spearfish60/user1/dbf/
>>>> exists. If not, please create it. From current GRASS 6.1-CVS 
>>>> onwards  the
>>>> dbf/ directory in the current
>>>> mapset is created automatically.
>>>>
>>>> Hope this helps
>>>>
>>>> Markus
>>>>
>>>>
>>>>
>>>
>>> Thanks Markus,
>>>
>>> It worked out perfectly fine.
>>>
>>> Now I would need to create my own location with a state boundary and 
>>>  an elevation model for California (this would provide the basis to 
>>> map  the output of my ecological model --reminder). Does anybody 
>>> know if  there is online files available for download that would 
>>> allow me to  accomplish such task? I have been trying to do this by 
>>> OGR importing  ESRI .shp files from http://gis.ca.gov/ into a 
>>> location with  projection based on .prj file content, but the new 
>>> layer does not show  up in the monitor. Any hints?
>>>
>>> Also when I try to access GRASS help, the following message shows up:
>>> "help /usr/local/grass6.0.0/scripts/g.manual: line 71: iexplore:  
>>> command not found".
>>> Is it that GRASS cannot find the browser?
>>>
>>> Finally, when trying to access the man version via "g.manual -m  
>>> d.rast", the shell says:
>>> "fopen: No such file or directory
>>> Cannot open man page  
>>> /home/Administrator/C:\cygwin/usr/local/grass6.0.0/man/man1/ 
>>> d.rast.1.gz
>>> No manual entry for 
>>> C:\cygwin/usr/local/grass6.0.0/man/man1/d.rast.1".
>>> Is there any fix to this?
>>>
>>> Ciao,
>>>
>>> Luigi
>>>
>>>
>> >
>> >
>> What happens if a big asteroid hits Earth? Judging from realistic  
>> simulations involving a sledge hammer and a common laboratory frog, 
>> we  can assume it will be pretty bad.
>>  - Dave Barry
>>
>>
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>>
>
>
 >
 >
What happens if a big asteroid hits Earth? Judging from realistic 
simulations involving a sledge hammer and a common laboratory frog, we 
can assume it will be pretty bad.
  - Dave Barry


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