asscciation for mexican cave studies box 7672 ut station austin ...

26In response to the questions posed in Hedges' letter of August 22:(1.) I favor a basic list of symbols which could be used in most situations.Additionally, a supplewentary list containing sywb0l.s whjch would be used onlyin special maps or in a't:roical situations. It sort. of appears that there arejust too many s:~bols floating around for them to be effectively used asstandard symbols. .(2.) I am in favor of developing the basic list by drawing from both the Hedges'list and AMeS's list. I really don't see that it is a question of building onone list as opposed to the other, but rather selecting the most appropriatesycbols from both lists.(3.) I am returning with this letter all the symbolz from both lists whichwere sent to me by Hedges. (Due to cost of Xeroxing, "this material is not beingforwarded to all c~ttee members.) I have indicated in the margins thosesymbols which should be part of a basic list and those which I feel would bestbe included in a supplementary listing. Symbols without marks were deemedinappropriate fer inclusion in either list.In addition to responding to Hedges' questions, I should like to addthat I do not think that a finalized set 0f symbols can be very effectivelydeveloped through a co~ttee st~~ctured such as this. I assume that weA.re sin'."ply functioning to more or less mediate a dispute rather than putforth a finalized "masterpiece".In closing, if you are in need of additional. comment, please do nothesitate to contact me.Tam CravensSTANDARD LEGEND FOR CANADIAN CAVER MAPSIn order to save time and effort in drafting cave maps I amproposing a standard set of cave symbols to be used on maps publishedin The Canadian Caver. Starting with this issue maps will be publishedwithout a legend, unless special symbols are used. A list of recommendedsymbols is given below and will be published (in a condensed form) ineach issue of The Canadian Caver. Unfortunately, there is no standardset of symbols in general use in North America so I have chosen a mixtureof those used by the C.R.G., the A.M.C.S. and the N.S.S. (as recommendedby James Hedges). Hopefully everyone will get together to producean acceptable list of cave symbols eventually.What must appear On every map is the name of the cave and atleast the province or state it is located in, a scale both in metresand feet, north arrow, the map units (ie. feet or metres), survey instrumentsused (preferably with some indication of the accuracy of thereadings) and the names of the surveyors. It is also usual to give thetotal surveyed length and depth of the cave. Other notes may be made atthe discretion of the draftsman. Those familar with the CRG system ofgrading may wish to use it. A good indicator or the accuracy of a surveyis the closure error on loops, and this should be quoted when possible.Peter ThompsonCanadian map symbols continued next page