Video: Puas shapefiles muaj topology?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Shapefiles tau qhia nrog kev tso tawm ntawm ArcView 2 thaum ntxov 1990s. A shapefile yog nontopological cov ntaub ntawv qauv uas ua tsis meej pem khw topological kev sib raug zoo. Txawm li cas los xij, tsis zoo li lwm cov qauv duab nraaj yooj yim, shapefile polygons yog sawv cev los ntawm ib lossis ntau lub nplhaib.
Xav txog qhov no, dab tsi yog planar topology?
Planar topology xav kom tag nrho cov kab pib thiab xaus rau hauv cov nodes thiab tsis muaj ob kab hla, ib yam li cov khoom polygonal. Nrog rau kev zam ntawm polygon filling, kev npaj thiab cov khoom polygonal tshwm tib yam.
Qhov thib ob, vim li cas topology tseem ceeb hauv GIS? Xaus Topology yog heev tseem ceeb hauv GIS vim nws ua qauv zoo rau kev sib raug zoo ntawm spatial entities. Topology txhawb kev hloov kho ntawm kev sib koom ua ke ntawm cov txheej txheem sib txawv ntawm cov txheej txheem spatial thiab yog ib txoj hauv kev los xyuas kom meej cov ntaub ntawv spatial.
Ib yam li ntawd, dab tsi yog cov yam ntxwv ntawm ib daim duab?
Shapefiles yog tsim los ntawm 3 cov ntaub ntawv yuav tsum tau ua. shp ,. shx og. dbf ua.
Qhov kev pab cuam twg qhib SHP cov ntaub ntawv?
Cov hom ntawv shapefile tam sim no yog ib hom kev khaws cia GIS cov ntaub ntawv. Shapefiles khaws cov ntaub ntawv tsis yog topological vector nrog rau cov ntaub ntawv muaj feem cuam tshuam. Tsim los ntawm Esri, shapefiles tuaj yeem nyeem ncaj qha los ntawm ntau GIS software programs xws li ArcGIS thiab QGIS.
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