Qhov yooj yim yuam kev thaum tsim ib tug mauv cartographic: Cov kev faib ntawm daim pheem thib
Kuv xav muab qhov no tshaj tawm rau qhov kev ua txhaum uas yooj yim, feem ntau hauv 1: 10,000 thiab 1: 1,000 daim duab qhia siv rau cov hom phiaj cadastral los ntawm 1: 50,000 mesh.
Nco qab tias nyob rau hauv lub dhau los post peb pom ua li cas los ua qhov no mesh, thiab yav tas los peb pom li cas cia li mus kom txog thaum koj tau txais rau 1: 1,000 daim ntawv qhia. Tab sis qhov kev txhaum yooj yim tshaj plaws yog kom ntseeg tau tias cov ntxaij no tuaj yeem tawg hauv daim duab, thiab qhov no tsis raug. Qhov sib koom tes yuav tsum tau tsim tawm ntawm kev siv ntev ntev thiab ntev ntev txhua zaus peb xav tsim denser ntxaij thiab yog tias peb tsis pom qhov tshwm sim.
Yog tias qhov no yog ib ntu ntawm 6 ° ntev ntev los ntawm 8 ° latitude, sib haum rau thaj tsam 16, ua kom muaj UTM kev koom tes yog yooj yim thiab xa nws mus rau AutoCAD. Piv txwv ib tug neeg mus vwm xav tias daim phiaj no tuaj yeem txiav los ntawm daim duab:
Ntawd qhov kev faib tawm, yam tsis tau suav nruab nrab nruab nrab, nkhaus yuav qhib kom txog thaum nws mus txog qhov nruab nrab qhov chaw uas nws yuav ua kom muaj qhov sib txawv ntawm 2,318.63 meters ntawm latitude.
Thaum ua cov kev faib tawm hauv qab no, qhov kev ua yuam kev zoo sib xws yuav tsim tawm, tab sis nws yuav raug txo kom tsawg raws li nram no:
1: 1,000 (6 °): tsis muaj faib
Sib faib cov 1: 500,000 (3 °): 2,318.63
Sib faib cov 1: 250,000 (1 ° 30´): 579.76
Sib faib cov 1: 100,000 (30´): 129.00
Sib faib cov 1: 50,000 (15´): 16.13
Cov txiaj ntsig yog nruab nrab ntawm kev faib tawm thiab qhov nrawm tam sim ntawd, yog li ntawd ntau npaum li cas lawv faib, qhov kawg tshwm sim yog tsim, uas xaus qhov kev puas tsuaj tiav yog tias tus kws kos duab zoo xyuas cov haujlwm.
Peb kuj pom tias yog tias peb faib 50,000 daim ntawv tshem tawm cov 10,000 mesh peb yuav muaj qhov yuam kev ntawm qhov chaw nruab nrab ntawm mus txog 16 metres uas rau kev sojntsuam hauv nroog loj yuav hnyav heev thiab phem tshaj yog tias nws tsis zoo vim tias qhov ntawd yog qhov yuam kev ntawm qhov chaw nruab nrab. Cov.
Txawm hais tias nyob rau hauv 10,000 kev faib tawm qhov sib txawv yog qhov tsawg heev yog li qhov kev coj ua cais ntawm daim ntawv no ntawm daim ntawv qhia yog qhov ntau heev ... ntev li ntev tau nws yuav zam nws yuav zoo dua.
Ib qho teeb meem yog xav kom tsim cov kab sib chaws hauv latitudes thiab ntev ntev raws li peb tau pom hauv no ncejRau luam ntawv cov hom phiaj, tab sis cov teeb meem loj tshaj plaws yog thaum twg thiab kev rov ua phem (xws li NAD27 txog NAD83) nrog qhov program ua rau cov hom phiaj no, qhov no yuav tsim cov splice uas tsis uas yuav ua rau kev tsim txom topological.
