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<body class='hmmessage'><div dir='ltr'>Hi Anna <span style="font-size: 12pt;">tnks for your answer, </span><div><span style="font-size: 12pt;">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?</span><div><div><br></div><div>Very tnks,</div><div>Alec<br><br><div><hr id="stopSpelling">From: kratochanna@gmail.com<br>Date: Sun, 13 Dec 2015 15:15:07 -0500<br>Subject: Re: [GRASS-user] Map scale wrong<br>To: alecventura@hotmail.com<br>CC: grass-user@lists.osgeo.org<br><br><div dir="ltr">Hi,<br><div class="ecxgmail_extra"><br><div class="ecxgmail_quote">On Sun, Dec 13, 2015 at 3:09 PM, Alec Ventura <span dir="ltr"><<a href="mailto:alecventura@hotmail.com" target="_blank">alecventura@hotmail.com</a>></span> wrote:<br><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;">
<div><div dir="ltr"><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">So... i have converted my shape file to this projection: <a href="http://spatialreference.org/ref/epsg/4618/" style="line-height:22.72px;font-weight:inherit;color:rgb(0,104,207);font-size:12pt;" target="_blank">http://spatialreference.org/ref/epsg/4618/</a> on Qgis, and have created</div></div></div></blockquote><div><br></div><div>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.</div><div><br></div><div>Anna </div><blockquote class="ecxgmail_quote" style="border-left:1px #ccc solid;padding-left:1ex;"><div><div dir="ltr"><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);"> a new projection and mapset with this same epsg on Grass...<br style="line-height:21.3px;"></div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">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</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);"><br style="line-height:21.3px;"></div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">And this is a problem because when i try to make the buffers over my points i have to use a very small distance:</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">g.run_command('v.buffer', input='PocosSad@Map3', output='boreholesGrassBuffer', type='point', distance='0.01')</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);"><br style="line-height:21.3px;"></div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">else my buffer covers the hole area.</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);"><br style="line-height:21.3px;"></div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">Anyone knows how i can fix this map scale? or why is this strange?</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);"><br style="line-height:21.3px;"></div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">my shape file is in attach,</div><div style="line-height:21.3px;color:rgb(68,68,68);font-size:15px;background-color:rgb(255,255,255);">Very tnks</div> </div></div>
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