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How to create a geojson file in R from a dataframe
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| #Write geojson | |
| #==== | |
| #Load libraries | |
| library(rgdal) | |
| #dataMap is a dataframe with coordinates on cols 11 (LATITUDE) and 12 (LONGITUDE) | |
| #Transfor coordinates to numeric | |
| dataMap$LATITUDE <- as.numeric(dataMap$LATITUDE) | |
| dataMap$LONGITUDE <- as.numeric(dataMap$LONGITUDE) | |
| dataMap.SP <- SpatialPointsDataFrame(dataMap[,c(12,11)],dataMap[,-c(12,11)]) | |
| str(dataMap.SP) # Now is class SpatialPointsDataFrame | |
| #Write as geojson | |
| writeOGR(dataMap.SP, 'dataMap.geojson','dataMap', driver='GeoJSON') |
What is the name of the geojson object you create? I try xx<-writeOGR(foo1_eqi.SP, 'foo1_eqi.geojson','foo1_eqi', driver='GeoJSON',check_exists = FALSE)
and take:
str(xx)
NULL
This feature generate a unique polygon? There is a iterative mode to create 1, 2, 3 polygons?
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