Thread: [Qlandkartegt-users] Ordnance Survey grid references?
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From: Adam F. <a2...@du...> - 2012-10-17 12:55:09
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(Sorry if this has already been covered; I did google unsuccessfully for the answer, but I've only been using QLandkarteGT for about a week, so I might not know what terms to use. But it's a fabulous program --- the best one I've discovered for a while.) When I right click on a point on the map, it shows a "Grid" lat-long, a "Map" set of coördinates (UTM, I think), and an unmarked lat-long. Is there any way to get it to show OSGB (Ordance Survey of Great Britain) grid references too? Is it possible to get the Grid overlay (using the Grid checkbox under the map) to show an OSGB grid instead of a lat-long grid? Thanks, Adam |
From: Oliver E. <oli...@gm...> - 2012-10-17 13:58:16
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Hi Adam, press the button with the wrench to setup the grid. OSGB seems to be EPSG:2770. Thus you enter +init=epsg:27700 as projection. Now the "Grid" entry shows you the OSGB coordinates in meter. HTH Oliver -------- Original-Nachricht -------- > Datum: Wed, 17 Oct 2012 13:31:14 +0100 > Von: Adam Funk <a2...@du...> > An: qla...@li... > Betreff: [Qlandkartegt-users] Ordnance Survey grid references? > (Sorry if this has already been covered; I did google unsuccessfully > for the answer, but I've only been using QLandkarteGT for about a > week, so I might not know what terms to use. But it's a fabulous > program --- the best one I've discovered for a while.) > > > When I right click on a point on the map, it shows a "Grid" lat-long, > a "Map" set of coördinates (UTM, I think), and an unmarked lat-long. > Is there any way to get it to show OSGB (Ordance Survey of Great > Britain) grid references too? > > Is it possible to get the Grid overlay (using the Grid checkbox under > the map) to show an OSGB grid instead of a lat-long grid? > > Thanks, > Adam > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: Adam F. <a2...@du...> - 2012-10-19 13:00:41
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On 2012-10-17, Oliver Eichler wrote: > Hi Adam, > > press the button with the wrench to setup the grid. OSGB seems to be EPSG:2770. Thus you enter > > +init=epsg:27700 > > as projection. Now the "Grid" entry shows you the OSGB coordinates in meter. Thanks! (I was really hoping for the more user-friendly form with the two-letter prefixes, but that works too.) Just curious --- where are those configuration values documented? Thanks, Adam |
From: Oliver E. <oli...@gm...> - 2012-10-19 13:38:54
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Hi Adam, all the projection stuff in QLGT is done by the Proj4 library. http://trac.osgeo.org/proj/ Proj4 is configured by strings. The easiest way to do so is to find the EPSG code. I used Google to search for "OSGB EPSG". If there is no EPSG code you have to fall back to a more complex form of the string. E.g. Gauss Krüger Zone 3 is: +proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 +y_0=0 +datum=potsdam +units=m +no_defs but I prefer: +init=epsg:31467 Imho if you get into the Proj4 syntax it's as easy as any other notation system that provides me with the same flexibility. Every country has it's own idea of how coordinates have to look like and what projection system / datum is used. Thus Proj4 is simply a compromise to manage them all. Oliver -------- Original-Nachricht -------- > Datum: Fri, 19 Oct 2012 13:45:50 +0100 > Von: Adam Funk <a2...@du...> > An: qla...@li... > Betreff: Re: [Qlandkartegt-users] Ordnance Survey grid references? > On 2012-10-17, Oliver Eichler wrote: > > > Hi Adam, > > > > press the button with the wrench to setup the grid. OSGB seems to be > EPSG:2770. Thus you enter > > > > +init=epsg:27700 > > > > as projection. Now the "Grid" entry shows you the OSGB coordinates in > meter. > > Thanks! (I was really hoping for the more user-friendly form with the > two-letter prefixes, but that works too.) > > Just curious --- where are those configuration values documented? > > Thanks, > Adam > > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: Andre J. <and...@nu...> - 2012-10-19 14:56:42
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Am 19.10.2012 15:38, schrieb Oliver Eichler: > Every > country has it's own idea of how coordinates have to look like and > what projection system / datum is used. To be honest, its not a question of "idea", but the best try to put a cartesian grid for surveying on the earths surface, which is not a ball, not even a perfect ellipsoid. And that was invented over a hundred years ago, when noone even thought of satellite photography, GPS and world wide google maps. Greetings, André Joost |
From: Oliver E. <oli...@gm...> - 2012-10-19 20:09:02
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Hi André, I know ;) But there is also a lot of pride. Every chief scientist couldn't take over the system of the neighbor country. And many reference points for the datum notations are on the same continental plate. And some countries like GB even invented their own local coordinate notation. That's all historic noise, with a certain reason. But taken the idea of the Enlightenment things should advance to a common system with datum references based on scientific reasons, not political ones. But apart from my own opinion things are like they are :) Oliver > Am 19.10.2012 15:38, schrieb Oliver Eichler: >> Every >> country has it's own idea of how coordinates have to look like and >> what projection system / datum is used. > > To be honest, its not a question of "idea", but the best try to put a > cartesian grid for surveying on the earths surface, which is not a ball, > not even a perfect ellipsoid. > And that was invented over a hundred years ago, when noone even thought > of satellite photography, GPS and world wide google maps. > > Greetings, > André Joost > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users > |
From: Adam F. <a2...@du...> - 2012-11-02 14:30:31
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On 2012-10-19, Andre Joost wrote: > Am 19.10.2012 15:38, schrieb Oliver Eichler: >> Every >> country has it's own idea of how coordinates have to look like and >> what projection system / datum is used. > > To be honest, its not a question of "idea", but the best try to put a > cartesian grid for surveying on the earths surface, which is not a ball, > not even a perfect ellipsoid. > And that was invented over a hundred years ago, when noone even thought > of satellite photography, GPS and world wide google maps. I've noticed that the wpt (waypoint) elements in the GPX files created by QLandkarteGT and by my GPS just have lat and lon attributes with decimal degree values; there doesn't appear to be any specification of the datum/projection. (I usually have the GPS set to display OSGB grid references, because I'm usually using OS maps.) Am I right in thinking that all the applications store the coördinates in one standard system, and convert them on the fly to whatever system the GPS or the mapping software is set to display? |
From: Oliver E. <oli...@gm...> - 2012-11-02 14:46:05
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Right. Internally all stuff is done with lon/lat WGS84. Just at the outside you can convert the coords to anything you like. If we wouldn't do it like that it would be building the Tower of Babel. Without doubt Transversal Mercator projections like the OSGB have their charm because you can calculate distances easily with a pocket calculator. On the other hand side, you can do that with a GPS devices, too. Thus I accustomed myself to the usual degree notation. -------- Original-Nachricht -------- > Datum: Fri, 02 Nov 2012 14:28:13 +0000 > Von: Adam Funk <a2...@du...> > An: qla...@li... > Betreff: Re: [Qlandkartegt-users] Ordnance Survey grid references? > On 2012-10-19, Andre Joost wrote: > > > Am 19.10.2012 15:38, schrieb Oliver Eichler: > >> Every > >> country has it's own idea of how coordinates have to look like and > >> what projection system / datum is used. > > > > To be honest, its not a question of "idea", but the best try to put a > > cartesian grid for surveying on the earths surface, which is not a ball, > > not even a perfect ellipsoid. > > And that was invented over a hundred years ago, when noone even thought > > of satellite photography, GPS and world wide google maps. > > I've noticed that the wpt (waypoint) elements in the GPX files created > by QLandkarteGT and by my GPS just have lat and lon attributes with > decimal degree values; there doesn't appear to be any specification of > the datum/projection. (I usually have the GPS set to display OSGB > grid references, because I'm usually using OS maps.) > > Am I right in thinking that all the applications store the coördinates > in one standard system, and convert them on the fly to whatever system > the GPS or the mapping software is set to display? > > > ------------------------------------------------------------------------------ > LogMeIn Central: Instant, anywhere, Remote PC access and management. > Stay in control, update software, and manage PCs from one command center > Diagnose problems and improve visibility into emerging IT issues > Automate, monitor and manage. Do more in less time with Central > http://p.sf.net/sfu/logmein12331_d2d > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: fergus <fe...@we...> - 2012-10-22 20:55:33
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I closed the Werkzeugbox with the mouse und can't open it again. Strg+T brings only an small (2mm) bar, whick can't be expanded with the mouse. what can I do? fergus |
From: Oliver E. <oli...@gm...> - 2012-10-23 06:21:41
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Hi fergus, you did not really close the box you resized it. Thus changing the size is the only way to go. You have to find the handle of the splitter view. Normally it's right in the middle of the movable splitter frame. Sometimes it's marked by a graphical element. The mouse will change if you hoover over it. if you have found it press the left mouse button and move the mouse. Oliver -------- Original-Nachricht -------- > Datum: Mon, 22 Oct 2012 22:55:06 +0200 > Von: fergus <fe...@we...> > An: qla...@li... > Betreff: [Qlandkartegt-users] Werkzeugbox > I closed the Werkzeugbox with the mouse und can't open it again. > Strg+T brings only an small (2mm) bar, whick can't be expanded with the > mouse. > what can I do? > fergus > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: Bernhard <ber...@gm...> - 2012-10-23 17:30:48
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Hi Oliver, I see the handle and get a doublearrow when the mouse hoovers over it, but I am unable to resize it with the mouse as you described. thanks for your help fergus -------- Weitergeleitete Nachricht -------- Von: Oliver Eichler <oli...@gm...> An: fergus <fe...@we...>, qla...@li... Betreff: Re: [Qlandkartegt-users] Werkzeugbox Datum: Tue, 23 Oct 2012 08:21:34 +0200 Hi fergus, you did not really close the box you resized it. Thus changing the size is the only way to go. You have to find the handle of the splitter view. Normally it's right in the middle of the movable splitter frame. Sometimes it's marked by a graphical element. The mouse will change if you hoover over it. if you have found it press the left mouse button and move the mouse. Oliver -------- Original-Nachricht -------- > Datum: Mon, 22 Oct 2012 22:55:06 +0200 > Von: fergus <fe...@we...> > An: qla...@li... > Betreff: [Qlandkartegt-users] Werkzeugbox > I closed the Werkzeugbox with the mouse und can't open it again. > Strg+T brings only an small (2mm) bar, whick can't be expanded with the > mouse. > what can I do? > fergus > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: fergus <fe...@we...> - 2012-10-23 17:41:45
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I tried it the whole afternoon with no result, but after a Guinness and a coffee it runs proberly. thanks for the help. I love this program; I stored the positions of nearly 10.000 monuments in Irland in it regards fergus -------- Weitergeleitete Nachricht -------- Von: Bernhard <ber...@gm...> An: qla...@li... Betreff: Re: [Qlandkartegt-users] Werkzeugbox Datum: Tue, 23 Oct 2012 19:29:49 +0200 Hi Oliver, I see the handle and get a doublearrow when the mouse hoovers over it, but I am unable to resize it with the mouse as you described. thanks for your help fergus -------- Weitergeleitete Nachricht -------- Von: Oliver Eichler <oli...@gm...> An: fergus <fe...@we...>, qla...@li... Betreff: Re: [Qlandkartegt-users] Werkzeugbox Datum: Tue, 23 Oct 2012 08:21:34 +0200 Hi fergus, you did not really close the box you resized it. Thus changing the size is the only way to go. You have to find the handle of the splitter view. Normally it's right in the middle of the movable splitter frame. Sometimes it's marked by a graphical element. The mouse will change if you hoover over it. if you have found it press the left mouse button and move the mouse. Oliver -------- Original-Nachricht -------- > Datum: Mon, 22 Oct 2012 22:55:06 +0200 > Von: fergus <fe...@we...> > An: qla...@li... > Betreff: [Qlandkartegt-users] Werkzeugbox > I closed the Werkzeugbox with the mouse und can't open it again. > Strg+T brings only an small (2mm) bar, whick can't be expanded with the > mouse. > what can I do? > fergus > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > Qlandkartegt-users mailing list > Qla...@li... > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users |
From: Adam F. <a2...@du...> - 2012-11-02 10:45:38
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On 2012-10-19, Oliver Eichler wrote: > Hi Adam, > > all the projection stuff in QLGT is done by the Proj4 library. > > http://trac.osgeo.org/proj/ > > Proj4 is configured by strings. The easiest way to do so is to find the EPSG code. I used Google to search for "OSGB EPSG". > > If there is no EPSG code you have to fall back to a more complex form of the string. E.g. Gauss Krüger Zone 3 is: > > +proj=tmerc +lat_0=0 +lon_0=12 +k=1 +x_0=4500000 +y_0=0 +datum=potsdam +units=m +no_defs > > but I prefer: > > +init=epsg:31467 > > Imho if you get into the Proj4 syntax it's as easy as any other notation system that provides me with the same flexibility. Every country has it's own idea of how coordinates have to look like and what projection system / datum is used. Thus Proj4 is simply a compromise to manage them all. That's interesting, thanks. |
From: Adam F. <a2...@du...> - 2012-11-02 22:00:34
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On 2012-11-02, Oliver Eichler wrote: > > Right. Internally all stuff is done with lon/lat WGS84. Just at the > outside you can convert the coords to anything you like. If we > wouldn't do it like that it would be building the Tower of Babel. I figured it would probably be WGS84; thanks. > Without doubt Transversal Mercator projections like the OSGB have > their charm because you can calculate distances easily with a pocket > calculator. On the other hand side, you can do that with a GPS > devices, too. Thus I accustomed myself to the usual degree notation. Well, those projections also make nice neat grids on the maps (at large scales, anyway), and the grids help with estimating areas. |