[GRASS-user] Map scale wrong

[Anna Petrášová]

On Sun, Dec 13, 2015 at 3:33 PM, Alec Ventura <alecventura at hotmail.com>
wrote:

> Hi Anna tnks for your answer,
> so which EPSG code you suggest i use? UTM? and i have the location of each
> point on my attribute table as LAT and LONG, what happens with this
> information when it changes to a projected coordinate system?
>

UTM is probably fine, just create a new location (based on EPSG of the
appropriate UTM system) and use v.proj to reproject your vector from the
latlon location.

>
> Very tnks,
> Alec
>
> ------------------------------
> From: kratochanna at gmail.com
> Date: Sun, 13 Dec 2015 15:15:07 -0500
> Subject: Re: [GRASS-user] Map scale wrong
> To: alecventura at hotmail.com
> CC: grass-user at lists.osgeo.org
>
>
> Hi,
>
> On Sun, Dec 13, 2015 at 3:09 PM, Alec Ventura <alecventura at hotmail.com>
> wrote:
>
> So... i have converted my shape file to this projection:
> http://spatialreference.org/ref/epsg/4618/ on Qgis, and have created
>
>
> you should probably use a projected coordinate system, not geographic
> coordinate system. The distance you specify in the buffer is now in
> degrees, that's why it needs to be so small.
>
> Anna
>
> a new projection and mapset with this same epsg on Grass...
> But when i import the shape on grass the map scale is still crazy, it says
> 1:6, but my area is huge and i can see all my points. On Qgis my same file
> has a 1:1.183.641 scale
>
> And this is a problem because when i try to make the buffers over my
> points i have to use a very small distance:
> g.run_command('v.buffer', input='PocosSad at Map3',
> output='boreholesGrassBuffer', type='point', distance='0.01')
>
> else my buffer covers the hole area.
>
> Anyone knows how i can fix this map scale? or why is this strange?
>
> my shape file is in attach,
> Very tnks
>
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