Hloov ib daim ntawv qhia txog NAD27 rau WGS84 (NAD83) nrog AutoCAD

Ua ntej peb tham txog vim li cas nyob rau hauv peb cheeb tsam, feem ntau ntawm cov laus cartography yog rau NAD 27, thaum lub sij hawm thoob ntiaj teb kev sib raug zoo yog kev siv ntawm NAD83, los yog muaj coob tus hu nws WGS84; Txawm hais tias ob leeg yeej ua rau tib lub tswv yim, qhov txawv yog Datum nkaus xwb (txawv nyob hauv UTM daim phiaj).

Ntau tus nkag mus rau hauv qhov kev tsis txaus ntshai uas ntseeg tias daim pheem thib tsuas yuav tsum tau tsiv mus rau ib lub vector, uas nyob rau hauv rooj plaub ntawm Honduras nyob rau hauv cov duab kos duab hais tias nws yog 202 meters rau sab qaum teb thiab 6 meters mus rau sab hnub tuaj; Tau kawg no yuav raug siv rau cov hauj lwm hauv zos, tab sis thaum ua qhov kev tsim txom raws li nws yuav tsum muaj, cov kev pab cuam hauv computer ua ke ntawm cov kev hloov ntawm cov kev hloov hauv cov kev hloov hauv cov kev qhia uas tau tshwm sim nyob rau hauv daim ntawv qhia uas txhua qhov chaw tau tsiv hauv daim phiaj tsis tas li, yog li nws yuav tsis splice rau hauv daim ntawv qhia "tsuas yog tsiv"

Nws tuaj yeem ua tiav nrog Microstation Geographcis, ARCGis lossis nrog Manifold; Hauv qhov no peb yuav pom yuav ua li cas thiaj nrog AutoCAD Map3D. Kuv yuav siv dab tsi uas kuv muaj (Map3D) ua lus Askiv yog li peb yuav sim khaws qee lub npe raws li lawv muaj nyob rau hauv cov ntawv qhia zaub mov thiab cov khawm thiab raws li tus phooj ywg CADGEEK tau thov ua ntej. Koj yuav tsum paub tias AutoCAD Land Desktop thiab AutoCAD Civil 3D, yav dhau los daim ntawv qhia AutoCAD tau dhau los ua daim ntawv thov no uas AutoCAD hu Map3D, tus txheej txheem tsis tau hloov rau cov qauv sib txawv.

Peb pib los ntawm kev ua nrog daim ntawv qhia dawb paug:

Cob phum daim qauv qhia rau daim tseem daim ntawv qhia

1. Peb pib kos duab dawb

2. Siv qhov chaw ua haujlwm "daim ntawv qhia classic", peb mus rau daim ntawv qhia / cov cuab yeej / muab lub ntiaj teb kev sib koom tes. Nyob rau hauv no txoj kev peb dwg twb muaj ib tug siv system, ntau ntawm no yog tsis ncaj ncees lawm vim hais tias lawv tsuas muab lub tshiab system, uas yuav ua rau erroneous cov ntaub ntawv. Hauv "xaiv qhov system" khawm peb xaiv lub hauv paus system.

3. Hauv qhov piv txwv no, kuv muaj daim ntawv qhia hauv NAD27, yog li peb xaiv qhov system no hauv "xaiv qhov system" khawm; Kuv xav kom dhau qhov no rau NAD83, kuv muab nws rau lub pob tom ntej ntawm tib lub vaj huam sib luag (qhov chaw kos duab). Nrog rau "xaiv cov duab" khawm, cov ntaub ntawv (lossis cov ntaub ntawv) yuav tsum rov ua dua yog xaiv.

4. Tam sim no peb daim ntawv qhia muaj ib qho kev sib koom ua ke, peb qhib lub luag haujlwm tiav yog tias tsis ua haujlwm. Nws tuaj yeem ua tiav nrog MAPWSPACE qhov hais kom ua bar, ces nkag mus.

5. Tam sim no los ntawm "daim ntawv qhia kev tshawb nrhiav", peb txoj cai-nias ntawm "daim duab" thiab xaiv "ntxiv"

6. Lub dialog box uas tshwm sim tso cai rau peb mus tshawb lub browser rau cov thawj cov ntaub ntawv, ib zaug peb tau pom nws peb siv lub "ntxiv" khawm.

7. Nrog rau kev kos duab ntxiv, peb tam sim no yuav teeb tsa cov lus nug. Txhawm rau ua qhov no, peb txoj cai-nias ntawm "cov lus nug tam sim no" los ntawm daim ntawv qhia browser vaj huam sib luag, thiab xaiv "txhais tau".

8. Los ntawm cov lus nug vaj huam sib luag, nyem rau ntawm "qhov chaw", nyob rau hauv "lus nug hom", thiab ces nias "ok" txais "txhua yam ciam teb". Qhov no txhais tau hais tias yog tias peb yuav mus sab laj thawj daim duab hauv nws cov chaw, nrog rau "npe lus nug" txhais, peb xaiv "kos" kev xaiv raws li "kev nug hom".

9. Tom qab txhais cov lus nug, peb nias lub pob "execute query" khawm. Thaum AutoCAD Daim Ntawv Qhia 3D ua tiav cov txheej txheem, peb ua qhov nthuav dav thiab koj tuaj yeem pom cov duab kos.

Nws yog tsim nyog hais tias Qee cov 3D cov khoom tsis nyiam kom txav tau yooj yim, vim nws yog qhov teeb meem ntawm cov teeb meem (ntau cov ntawv, cov ntaub ntawv sau) lossis cov uas zoo li cov Islands tuaj (thaj av hauv cov av); cov neeg uas yog topologically dirty xws li cov neeg ua nrog smartline thiab lwm yam aberrations. Lawv feem ntau yog blocks los yog pawg uas yuav tsum tau exploited ua ntej reprojection.

Ntawm: Cov CAD Blog Geek