<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div><br></div><div>I don't use the vector modules a lot and so they don't get a lot of testing from me. I'm trying to do a project with someone that uses vector module and I find that some key things are broken. The following apply to GRASS 7 and GRASS 6.4.3.</div><div><br></div><div>1) v.distance gives bogus results for point to line distance uploads in a latlon region. For example, the distance uploaded from one site point to the nearest waterway is 5767967.05475, yet measuring this with the distance tool gives a much more reasonable 33211 m. The uploaded distance is off by an order of 173X -- an enormous error. Nothing in the docs says that you cannot use v.distance with latlon regions. </div><div><br></div><div>2) To get around this, I thought I'd try to get the length of the line that connects each site point with its nearest waterway (a v.distance option). But when I tried to make a new table for this in the table manager, I find that I cannot access the "table description" section of the "manage layers" page in the attribute table manager. This is again because wx.StaticBox needs to be defined in a particular order or the Mac interface cannot access it. This has been a recurrent problem with wx.StaticBox. The StaticBox must be instantiated before any of its contents. </div><div><br></div><div>3) After creating a linked table using v.db.addtable instead of the attribute manager, I tried to modify the layer in the attribute table manager, but only received a message that "<flag> is not a valid value". Another bug.</div><div><br></div><div>I did manage to get a length value into the lines connecting the points and they are quite reasonable values. But of course I have no way that I can see to link the distance lines back to the points from which they were created with v.distance. So I still don't have analysis results and my colleague is ready to try this in ArcGIS. </div><div><br></div><div>Any suggestion for a workaround would be much appreciated. And of course, the multiple bugs here need to be fixed.</div><div><br></div><div>Michael</div><div><br></div><div><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="font-size: 12px; ">_____________________</span><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="font-size: 12px; ">C. Michael Barton</div><div style="font-size: 12px; ">Visiting Scientist, Integrated Science Program</div><div style="font-size: 12px; ">National Center for Atmospheric Research &</div><div style="font-size: 12px; ">University Consortium for Atmospheric Research</div><div style="font-size: 12px; ">303-497-2889 (voice)</div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; ">Director, Center for Social Dynamics & Complexity </div><div style="font-size: 12px; ">Professor of Anthropology, School of Human Evolution & Social Change</div><div style="font-size: 12px; ">Arizona State University</div><div style="font-size: 12px; ">www: <a href="http://www.public.asu.edu/~cmbarton">http://www.public.asu.edu/~cmbarton</a>, <a href="http://csdc.asu.edu/">http://csdc.asu.edu</a></div></div><div><br></div></div></span></div></span></div></span></span></div></div><div><br></div></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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