[Therion] Joining old and new surveys
Steven I have done this a couple of times, although I have always first created a pseudo survey by making a very (very) crude centerline based on the original plan and elevation drawings (or plan and estimated altitudes) using a scale rule and pencil. I measure overall x and y coords of the pseudo stations (only about 10 or 20 for an entire cave) and use a spreadsheet to calculate delta x and delta y values for each pseudo leg to enter thus. declination 21 deg # is effective with cartesian co-ords, tick flags duplicate #prevents length accumulation flags approximate data cartesian from to northing easting altitude 7 7a 90 -99 4.5 7a 9 97 -9 4.5 9 10 31 -22 0 I then draw a collection of scraps attached to this centerline, and THEN fix any entrances with known gps coordinates. Ie Similar to what you have done, but there is a crude centerline that allows model outputs to be generated as well as map outputs. Now, whenever we do some modern survey deep in the cave, there is generally a pseudo station somewhere nearby to connect to. Of course it will be not quite in the right place, so we just add another differential pseudo leg between the closest pseudo station and the estimated position of our new modern survey. Some related information in this link that seems closer to what you have done (but not what I have followed http://therion.speleo.sk/wiki/doku.php/faq?s[]=cartesian#how_to_add_old_lost _data_survey_to_some_new_data <http://therion.speleo.sk/wiki/doku.php/faq?s%5b%5d=cartesian#how_to_add_old _lost_data_survey_to_some_new_data> Not sure if the above will be that helpful, given you have progressed as far as you have, but hopefully give you some ideas. Bruce _ From: therion-bounces at speleo.sk [mailto:therion-boun...@speleo.sk] On Behalf Of Steven Tucker Sent: Tuesday, 17 February 2015 7:15 p.m. To: therion at speleo.sk Subject: [Therion] Joining old and new surveys Hi, I have an old survey from the 80s and I have new sections that I want to add with Therion. The old survey has no centerline data. I have redrawn the old survey in a th2 file and allocated 3 points which correspond to 3 different entrances. In the th file I have given coordinates to all 3 of those points. This works perfectly. I am struggling to connect the new section with this old section. The new section starts in a deep section of the cave and is far away from any of my currently defined points. What is the easiest way to connect the new and old sections? Thanks, Steven -- next part -- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150217/5fdd326f/attachment.html>
[Therion] Therion Requests
On 17 February 2015 at 10:10, kevin dixon wrote: > Colour by Altitude > > Cross Sections > I have a major cave system in Survex with lots of splays that help define > cross sections and I am in the process of converting it all to Therion again > - was not happy with the first conversion due to my inexperience with > Therion. > Is it possible to create a cross section within Xtherion by selecting the > station and only the splays that define the cross section ? > That is, either the software automatically grabs the splays within a certain > threshold perpendicular to the centreline or the software allows manual > selection of which splays to use. My current method of manually creating > cross section data subsets is time consuming. > > The code of topParser is there for selecting the sprays within x degrees of a cross section, but I have not finished the implementation or tested it, unfortunately limited time to progress this at the moment, also only works for top files Andrew >Thanks, > > Kevin > > ___ > Therion mailing list > Therion at speleo.sk > http://mailman.speleo.sk/mailman/listinfo/therion >
[Therion] Joining old and new surveys
> 17. 2. 2015 v 13:34, Graham Mullan : > > One always has to remember, however, that Compass natively stores all linear > measurements in feet and decimal feet, not in metres. This is the case > however the > data is inputted. I have accidentally ended up with some alarmingly long > caves before > remembering this! Therion may too. :) m.s.
[Therion] Joining old and new surveys
On Tue, 17 Feb 2015 09:12:00 +0100 Martin Sluka wrote >It is really a nice piece of software. I use http://winebottler.kronenberg.org >to use it on Mac. Maybe for Linux there is something similar. Yes it is, very easy to use in most cases. >As I checked, Compass .dat file is small subset of Therion?s survey and >centerline structure. Very easy to convert it in a plain text editor. One always has to remember, however, that Compass natively stores all linear measurements in feet and decimal feet, not in metres. This is the case however the data is inputted. I have accidentally ended up with some alarmingly long caves before remembering this! Graham
[Therion] Therion Requests
Colour by Altitude Is it possible to colour by altitude along the wall edges only ? I do not want the scrap filled with colour, just a colour edging along the walls, either inside or outside and preferably able to define the colour width. Perhaps add a feature to the colour fill function to allow the user to specify complete fill or edge width plus inside/outside ? Cross Sections I have a major cave system in Survex with lots of splays that help define cross sections and I am in the process of converting it all to Therion again - was not happy with the first conversion due to my inexperience with Therion. Is it possible to create a cross section within Xtherion by selecting the station and only the splays that define the cross section ? That is, either the software automatically grabs the splays within a certain threshold perpendicular to the centreline or the software allows manual selection of which splays to use. My current method of manually creating cross section data subsets is time consuming. Thanks, Kevin -- next part -- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150217/47f0869b/attachment.html>
[Therion] Joining old and new surveys
> 17. 2. 2015 v 8:50, Graham Mullan : > > Digitise the old survey. I have successfully used Larry Fish's "Map to Dat" > utility > from "Compass" to do this, though you then have the irritation of converting > Compass > data to Therion (not difficult, just irritating). It is really a nice piece of software. I use http://winebottler.kronenberg.org to use it on Mac. Maybe for Linux there is something similar. As I checked, Compass .dat file is small subset of Therionâs survey and centerline structure. Very easy to convert it in a plain text editor. m.s.
[Therion] Joining old and new surveys
On Tue, 17 Feb 2015 08:15:16 +0200, Steven Tucker wrote Hi, I have an old survey from the 80s and I have new sections that I want to add with Therion. The old survey has no centerline data. I have redrawn the old survey in a th2 file and allocated 3 points which correspond to 3 different entrances. In the th file I have given coordinates to all 3 of those points. This works perfectly. I am struggling to connect the new section with this old section. The new section starts in a deep section of the cave and is far away from any of my currently defined points. What is the easiest way to connect the new and old sections? Steve As other contributors have noted, you need centreline data from your entrance fixed points to the start of your new section. There are only two ways to do this: Run a rapid centreline survey through the cave to the start of the new sections & hang everything off that. Or Digitise the old survey. I have successfully used Larry Fish's "Map to Dat" utility from "Compass" to do this, though you then have the irritation of converting Compass data to Therion (not difficult, just irritating). Both of these approaches work OK when producing 3D models, but I have found them rather less satisfactory when producing drawings as far various reasons the old drawings never seem quite 'right'. A third approach is to hunt down the original surveyors and see if the notes really have been lost or just left in a drawer somewhere. If the latter, rejoice, if the former then, well, smearing them with honey & lowering them into a pit of tiger ants seems about right. Alternatively, you could just bite the bullet & resurvey the whole system from scratch, we've had to do this once or twice & some of the largest systems in the UK have been/are being completely redone for these reasons. If you do take this path then please just ensure that your data is archived properly so no-one else is faced with the same problem in another 30 years or so. Graham
[Therion] Joining old and new surveys
Hi, I have an old survey from the 80s and I have new sections that I want to add with Therion. The old survey has no centerline data. I have redrawn the old survey in a th2 file and allocated 3 points which correspond to 3 different entrances. In the th file I have given coordinates to all 3 of those points. This works perfectly. I am struggling to connect the new section with this old section. The new section starts in a deep section of the cave and is far away from any of my currently defined points. What is the easiest way to connect the new and old sections? Thanks, Steven -- next part -- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150217/7b4e/attachment.html>
[Therion] Joining old and new surveys
Hi, I would think to create an auxiliary point and fictitious in the plan and in elevation map, so would put the new section is from there. Filippo On 17/02/2015 07:15, Steven Tucker wrote: > Hi, > > I have an old survey from the 80s and I have new sections that I want to > add with Therion. The old survey has no centerline data. > > I have redrawn the old survey in a th2 file and allocated 3 points which > correspond to 3 different entrances. In the th file I have given > coordinates to all 3 of those points. This works perfectly. > > I am struggling to connect the new section with this old section. The new > section starts in a deep section of the cave and is far away from any of my > currently defined points. > > What is the easiest way to connect the new and old sections? > > Thanks, > > Steven > > > > ___ > Therion mailing list > Therion at speleo.sk > http://mailman.speleo.sk/mailman/listinfo/therion > -- next part -- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: OpenPGP digital signature URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20150217/afa4ecc2/attachment.sig>