Cov txheej txheem:
Video: Geospatial index yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Geospatial Index
Ib qhov ntsuas dhau ib qho kev sau cov ntaub ntawv enables optimized query ntawm cov ntaub ntawv. Index hom tuaj yeem sib txawv. raws li hom ntawm cov ntaub ntawv thiab yuav tsum tau xaiv kom zoo zoo los txhim kho cov lus nug ceev.
Hais txog qhov no, txhais li cas los ntawm spatial cov ntaub ntawv?
Kuj tseem hu ua geospatial cov ntaub ntawv los yog geographic ntaub ntawv nws yog tus cov ntaub ntawv los yog cov ntaub ntawv uas txheeb xyuas thaj chaw ntawm cov yam ntxwv thiab thaj tsam ntawm lub ntiaj teb, xws li cov yam ntxwv ntawm ntuj los yog tsim, dej hiav txwv, thiab lwm yam. Cov ntaub ntawv spatial feem ntau yog khaws cia raws li kev tswj hwm thiab topology, thiab yog cov ntaub ntawv uas yuav tau mapped.
Ib sab saum toj no, dab tsi yog qhov sib txawv ntawm cov ntaub ntawv spatial? Cov ntaub ntawv spatial yog ob hom raws li cov txheej txheem khaws cia, uas yog, raster cov ntaub ntawv thiab vector cov ntaub ntawv . Raster cov ntaub ntawv yog tsim los ntawm kab hluav taws xob txheeb xyuas los ntawm kab thiab kab. Tag nrho thaj chaw yog muab faib ua pawg ntawm ib tus neeg lub hlwb, uas sawv cev rau cov duab.
Ntawm no, geospatial MongoDB yog dab tsi?
Txheej txheem cej luam. MongoDB's geospatial indexing tso cai rau koj kom ua tau zoo spatial queries ntawm ib tug sau uas muaj geospatial cov duab thiab cov ntsiab lus.
Cov ntaub ntawv geospatial khaws cia li cas?
Geospatial cov ntaub ntawv tuaj yeem yog khaws cia hauv cov lus yooj yooj yim xws li comma-separate variable (CSV) cov ntaub ntawv raws li kab latitude thiab longitude txuam rau txhua kab nrog cov cwj pwm tshwj xeeb ntawm cov latitudes thiab longitudes. Txawm li cas los xij, qhov no feem ntau txwv rau cov ntsiab lus, tsis yog thaj chaw.
Pom zoo:
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