smoothingToGrid: Building of a basemap from smoothed data (Fonction de...

In ArlindoDosSantos/btb: Beyond the Border

Description

Transforms smoothed data into grid data for export as cartographical data.

(Transforme un lissage en un carroyage pour export cartographique.)

Usage

  smoothingToGrid(grid, epsg, fUpdateProgress = NULL)

Arguments

grid	the grid obtained from the smoothing (le grid obtenu lors du lissage)
epsg	EPSG code (code EPSG de projection)
fUpdateProgress	leave empty for the speedest mode; or give a fct to see the compute progress (slower) (ne pas remplir pour utiliser la fonction dans son mode le plus rapide; ou fournir une fonction pour suivre la progresion du traitement (plus lent))

Details

Returns a spatialPolygonsdataframe.

(Retourne un spatialPolygonsdataframe.)

Author(s)

Psar Analyse Urbaine Insee - Thierry Cornely, Laure Genebes, Arlindo Dos Santos, Cynthia Faivre, Auriane Renaud and Francois Semecurbe

Examples

## Not run: 
data(reunion)
# Smoothing all variables for Reunion (Lissage de toutes les variables pour la Reunion)

# Call mode 1: classic smoothing - automatic grid
reunionSmooth <- kernelSmoothing(dfObservations = reunion, cellSize = 200
                                , bandwidth = 400)

# Call mode 2: median smoothing - automatic grid
reunionSmooth <- kernelSmoothing(dfObservations = reunion, cellSize = 200
                                , bandwidth = 400, vQuantiles = c(0.1, 0.5, 0.9))

# Call mode 3: classic smoothing - user grid
dfCentroidsUser <- merge( x = seq(from =  314400, to = 378800,  by = 200)
                        , y = seq(from = 7634000, to = 7691200, by = 200))
reunionSmooth <- kernelSmoothing(dfObservations = reunion, cellSize = 200
                                , bandwidth = 400, dfCentroids = dfCentroidsUser)

# Call mode 4: median smoothing - user grid
reunionSmooth <- kernelSmoothing(dfObservations = reunion, cellSize = 200
                                , bandwidth = 400, vQuantiles = c(0.1, 0.5, 0.9)
                                , dfCentroids = dfCentroidsUser)

# Building of the associated basemap (Creation du fond de carte associe)
grid <- smoothingToGrid(reunionSmooth, "32740")

# preview (Apercu)
library(sp)
library(cartography)
cartography::choroLayer(grid, var = "houhold", nclass = 5
                      , method = "fisher-jenks", border = NA)

# Export of the basemap in shapefile format (Export du fond de carte au format shapefile)
library(rgdal)
rgdal::writeOGR(grid, "reunion.shp", "reunion", driver = "ESRI Shapefile")

## End(Not run)

ArlindoDosSantos/btb documentation built on May 30, 2019, 7:58 p.m.