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pockettopotherion [2018/12/08 05:19] – PocketTopo mark intended deletion brucemutton | pockettopotherion [2019/01/27 01:25] (current) – brucemutton | ||
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- | [[start]]>> | + | [[start]]>> |
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- | 8 December 2018: \\ | + | |
- | Much of the PocketTopo information below on station numbering and survey legs seems to be needlessly complicated, | + | |
- | Bruce Mutton | + | |
+ | =====PocketTopo and Therion===== | ||
+ | Refer to this wiki's [[contrib: | ||
====PDA Booking==== | ====PDA Booking==== | ||
==ALWAYS when stop sketching switch PocketTopo to cave map view mode (middle icon) to avoid unwanted creating of accidental lines near borders of sketching area!== | ==ALWAYS when stop sketching switch PocketTopo to cave map view mode (middle icon) to avoid unwanted creating of accidental lines near borders of sketching area!== | ||
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2. Main reasons to start a new file are when a new days survey is started, a new survey is starting in a different location, or if the plan or elevation centrelines start overlapping (causing the sketching to become difficult). | 2. Main reasons to start a new file are when a new days survey is started, a new survey is starting in a different location, or if the plan or elevation centrelines start overlapping (causing the sketching to become difficult). | ||
This way the centrelines of other surveys remain visible and only the sketches of the currently open file can be seen (reduces confusion). | This way the centrelines of other surveys remain visible and only the sketches of the currently open file can be seen (reduces confusion). | ||
- | |||
- | The definition of ' | ||
- | |||
- | ==PocketTopo Station Numbering== | ||
- | *The logic of PocketTopo numbering follows the so-called " | ||
- | *[[http:// | ||
- | *[[http:// | ||
- | *[[http:// | ||
- | *[[http:// | ||
- | *The cave survey is divided into a number of " | ||
- | *The station label //m//.0 is only used when starting at a previously unsurveyed location. | ||
- | *Each series needs to be stored in it's own separate file. ie You use Menu.File.New when you need to start a new series. | ||
- | |||
- | ==PocketTopo Survey Loops and Connections== | ||
- | I break these rules (for numbering and series) regularly, and don't seem to suffer too many consequences. | ||
- | |||
- | *The series MUST NOT cross itself. This means that loops can ONLY be formed at the start or end of a series. | ||
- | |||
- | *The series are linked at start or end points. That is, each series can ONLY attach to the start or end point of a different series, or to somewhere in the middle of itself. A series can also start or end without attaching to another series (but must be attached at one end if there are more than one series in the cave, unless of course you know the co-ordinates for a point in the ' | ||
- | |||
- | *This means that each survey station has one and only one number/ | ||
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- | |||
- | {{: | ||
- | {{: | ||
- | |||
- | This is why series 4 (yellow) ends when it gets to station 1.4, and continues as series 5. Similarly for series 7 (green) to series 12, and series 8 (purple) to series 9. | ||
- | |||
- | As mentioned above, the rules above on station numbering, loops and connections seem to be overly restrictive and in my experience PocketTopo works just fine 98% of the time when i ignore them. | ||
===PocketTopo on Trimble Recon=== | ===PocketTopo on Trimble Recon=== | ||
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right soft button restores File Explorer | right soft button restores File Explorer | ||
- | *Within PocketTopo, all files (series) | + | *Within PocketTopo, all files stored in the same folder relate to the SAME CAVE. The folders MUST BE created in root of directory structure. |
*Note that the Recon (or PocketTopo? | *Note that the Recon (or PocketTopo? | ||
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*__Before you start surveying__, | *__Before you start surveying__, | ||
- | *Make a note of < | + | *Make a note of < |
- | | + | |
*Note Survey team members and roles | *Note Survey team members and roles | ||
*(If you edit this information after you have done some survey shots, it will not be associated with those shots already completed - you can manually over-ride this once you get the data into Therion however). | *(If you edit this information after you have done some survey shots, it will not be associated with those shots already completed - you can manually over-ride this once you get the data into Therion however). | ||
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- | * If you have used an alpha survey prefix, add it to each survey centerline with // | + | * If you have used an alpha survey prefix, add it to each survey centerline with // |
This saves a lot of typing. See [[drawingchecklist# | This saves a lot of typing. See [[drawingchecklist# | ||
station-names AA[] | station-names AA[] | ||
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- If the connection works but no data is transferred, | - If the connection works but no data is transferred, | ||
- | ==== Troubleshooting Erroneous Measurements ==== | ||
- | These are more warnings to be cautious and observant, rather that troubleshooting as such. | ||
- | ===Battery Changes=== | ||
- | ALWAYS carry out the accuracy | ||
- | < | ||
- | calibrate compass 0.5 # half of largest difference in accuracy test | ||
- | calibrate clino 0.2 | ||
- | </ | ||
- | Think carefully about the sign of the correction! | ||
- | |||
- | I have made a spreadsheet to help with this [TO DO post the spreadsheet] | ||
- | |||
- | ===Distance=== | ||
- | We've noticed that spurious distance measurements are more common than we would like, maybe 2% of shots?? | ||
- | |||
- | This can manifest a little bit like the sticking of compass or clino (see below) except that the erroneous measurements are usually not identical - so leading you to believe it is a normal measurement discrepancy. | ||
- | One explanation is that the laser is bouncing off nearby walls. | ||
- | I suspect this problem is more frequent when the batteries are getting low, down to their last 1000 or so shots (although Beat has assured me that this is unlikely). | ||
- | ===Compass and Clino=== | ||
- | Both the compass and clino sensors seem to stick sometimes. | ||
- | Ferrous objects and magnetic fields will affect the compass of course. |