Hi Johny, there are several tricks for very mazy caves: 1. make short scraps 2. try not to join scraps where passages are joining 3. join named lines (with ID) 4. you may join not only ends of lines. You may use any line point of any object not only wall. If a passage begins among blocks you may join the beginning of passage walls to blocks line points so they will be transformed together. for example: join ms3_S1_2:32 js1_S1_2:3 where ms3_S1_2:32 means 32. line point from beginning of line ms3_S1_2 and js1_S1_2:3 means 3. line point from beginning of line js1_S1_2 5. use transparent pits, overhangs, steps, - check examples on wiki. line overhang -outline in -clip off line pit -close on -outline in -clip off 6. use invisible lines if necessary line border -visibility off -outline in 7. very important if you want to generate an atlas - you should organize the structure of maps according to atlas pages and under and over laying passages. for example: survey xxxxx .... .... .... map hlavny_tah.m js2_S1 mb1b_s1 mb1a_s1 mb2_s1 ms1_S1 ms2_S1 ms2_S2 break ms2_S3 break ms2_S4 ph1_S1 ph1_S2 ph1_S3 ph1_S4 ph1_S5 ph1_S6 ph1_S7 ph1_S8 js1_S1 ph3_S6 ph2_S1 preview above duhovy_dom.m preview above ph_vrchna_chodba.m preview above kralova_chodba.m preview below ph_spodne_chodby.m endmap map medzibrodie.m js4_S1 preview below duhovy_dom.m preview below hlavny_tah.m endmap map duhovy_dom.m js3_S1 preview below hlavny_tah.m preview above medzibrodie.m endmap map kralova_chodba.m ms3_S1 break ms3_S2 preview below hlavny_tah.m endmap map ph_vrchna_chodba.m ph3_S1 ph3_S2 ph4_S2 break ph4_S1 break ph4_S3 preview below hlavny_tah.m preview below ph_spodne_chodby.m endmap map ph_spodne_chodby.m ph3_S5 ph3_S3 break ph3_S4 ph4_S4 break ph4_S5 ph4_S6 break ph4_S7 ph2_S2 break ph2_S3 preview above ph_vrchna_chodba.m preview above hlavny_tah.m endmap map klisura_a -title "Great Canyon<br>Gryka e Madhe<br>Velika Klisura" medzibrodie.m duhovy_dom.m kralova_chodba.m ph_vrchna_chodba.m hlavny_tah.m ph_spodne_chodby.m endmap endsurvey Martin On 25.11.2006, at 17:56, Jonathan Prouty wrote:
Hello all, I have a question regarding surveying (and mapping) extremely mazy multi-level caves. There is a cave near my home that has never been mapped, I assume due to it's extremely mazy nature.
I am considering taking it on as a project, however, I have no idea how to survey it. Do any of you have advice as to how to best manage such a survey?
I imagine I will have to be extremely careful with how I create scraps in therion, as well. I can think of several places in the cave that have 5 or 6 passages all meeting in one small room.
Any advice would be greatly appreciated. Thanks :-).
Sincerely, Jonny Prouty _______________________________________________ Therion mailing list Therion@speleo.sk http://www.speleo.sk/mailman/listinfo/therion