Cov txheej txheem:
Video: Yuav ua li cas kuv daim ntawv qhia shapefile hauv R?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Nyeem cov shapefile rau hauv R (peb npe shp ). Xaiv cov cheeb tsam sib txawv, uas yuav tsum sib txawv rau cov kab sib txawv.
Plotting ib shapefile yam tsis muaj tus cwj pwm yog ib qho yooj yim, uas ua raws cov kauj ruam:
- Tau qhov shapefile .
- Nyeem cov shapefile rau hauv R . Piv txwv li, siv rgdal::readOGR.
- Siv ggplot los npaj cov shapefile .
- Ua tiav!
Ib yam li ntawd, dab tsi yog shapefile hauv R?
Shapefiles yog ib txoj hauv kev los khaws cov ntaub ntawv geospatial. Cov ncej no piav qhia yuav ua li cas nyeem nrog R thiab pob rgdal, thiab yuav ua li cas npaj nws hauv paus R los yog nrog ggplot2. Feem ntau, koj yuav pom nws ua ib qho daim ntaub ntawv hom ntawv. Hom ntawv no yog tsim los ntawm ntau cov ntaub ntawv uas koj yuav tsum tau khaws ua ke hauv tib lub nplaub tshev.
Tom qab ntawd, lo lus nug yog, koj ua li cas daim ntawv teev npe R? Koj tsim daim ntawv qhia Leaflet nrog cov kauj ruam yooj yim no:
- Tsim ib daim ntawv qhia widget los ntawm kev hu rau nplooj ntawv ().
- Ntxiv cov khaubncaws sab nraud povtseg (piv txwv li, nta) rau hauv daim ntawv qhia los ntawm kev siv cov txheej txheem ua haujlwm (xws li addTiles, addMarkers, addPolygons) los hloov kho daim ntawv qhia widget.
- Rov ua kauj ruam 2 raws li xav tau.
- Sau daim ntawv qhia widget kom pom nws.
Ua li no, R puas tuaj yeem nyeem cov duab duab?
Koj ua tau siv sf tsev qiv ntawv qhib Shapefiles ncaj qha rau hauv R . Nws nrawm dua li rgdal tsev qiv ntawv, kos ntawm no: Cov Nta Yooj Yim rau R - Cov qhab nia. Yog xav paub ntxiv txog sf pob kos rau qhov project homepage r - qhov chaw.
Yuav ua li cas koj ua ib tug scale rau ib daim ntawv qhia?
Nov yog plaub kauj ruam yooj yim koj yuav xav ua raws li:
- Nrhiav ib daim duab qhia chaw uas koj xav siv.
- Nrhiav ob qhov tseeb thiab ntsuas qhov deb ntawm ob lub ntsiab lus ntawm koj daim ntawv qhia.
- Faib qhov kev ncua deb los ntawm qhov ntsuas qhov deb ntawm daim ntawv qhia rau koj qhov ntsuas.
- Muab koj cov lej ntsuas rau ntawm daim ntawv qhia.
Pom zoo:
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