The permanent human presence in Corsica is documented in the Neolithic period from the 6th millennium BC. To the Ancient Greeks it was known as Kalliste, Corsis, Cyrnos, Cernealis, or Cirné.Ĭorsica has been occupied since the Mesolithic era. The origin of the name Corsica is subject to much debate and remains a mystery. Main article: Prehistory of Corsica Carthage and its dependencies in 264 BC Corsica was a part of Carthage The medieval influence of Pisa in Corsica can be seen in the Romanesque-Pisan style of the Church of Aregno. Corsica is the least populated region of metropolitan France, and the third-least populated overall after Mayotte and French Guiana. Corsican, the native tongue and an Italo-Dalmatian language, is recognised as one of France's regional languages. Because of Corsica's historical ties to Tuscany, the island has retained many Italian cultural elements and many Corsican surnames are rooted in the Italian peninsula. The future Emperor of the French, Napoleon Bonaparte, was a native Corsican, born that same year in Ajaccio: his ancestral home, Maison Bonaparte, is today a visitor attraction and museum. In 1768, Genoa officially ceded it to Louis XV of France as part of a pledge for the debts incurred after enlisting French military help in suppressing the Corsican revolt as a result France annexed the island in 1769. Corsica's second-largest town is Bastia, the prefecture of Haute-Corse.Ĭorsica was ruled by the Republic of Genoa from 1284 to 1755, when it seceded to become a self-proclaimed, Italian-speaking Republic. As such, Corsica enjoys a greater degree of autonomy than other French regional collectivities for example, the Corsican Assembly is permitted to exercise limited executive powers. Although the region is divided into two administrative departments, Haute-Corse and Corse-du-Sud, their respective regional and departmental territorial collectivities were merged on 1 January 2018 to form the single territorial collectivity of Corsica. The island is a territorial collectivity of France. As of January 2023, it had a population of 351,255. A single chain of mountains makes up two-thirds of the island.
It is the fourth-largest island in the Mediterranean and lies southeast of the French mainland, west of the Italian Peninsula and immediately north of the Italian island of Sardinia, which is the land mass nearest to it. Grid=points2grid(df2,tolerance=0.00587692) # 0.Corsica ( / ˈ k ɔːr s ɪ k ə/ KOR-sik-ə, Upper Corsican:, Southern Corsican:, Italian: French: Corse ( listen) Ligurian: Còrsega) is an island in the Mediterranean Sea and one of the 18 regions of France. Proj4string(df2)=CRS("+init=epsg:4326") # points are initially projected in WGS84ĭf2=spTransform(df2,CRS("+init=epsg:27572")) # points are distributed on an approximatly regular grid in NTF Lambert Zone II (thank you !!!) Within this sf object: each polygon will correspond to a cell of the final spatial grid each polygon will be centered on a spatial point from df and each polygon will inherit the ID of the point (from df) on which it is centered.ĭf=read.table("~/centroids.csv",sep=",",header=TRUE) Once I will be able compute those tiles (or polygons), I want to store them in a simple feature object (from the sf package). I am always fighting against projection or non-regular/planar coordinates errors ! I also tried to use gBuffer() such as in this post.
I tried several methods from the sf and raster package such as : st_make_grid(), rasterFromXYZ() combined with rasterToPolygons() that I saw in this post, or even the basic raster() using gridded() that I saw on this post. Something like in this post, with each point of df at the center of tiles, such as :
I want to compute "tile" polygons that will fill the entire space around these points. I am starting with a long/lat dataframe containing around 8000 point-location over France ( data available here). These spatial points are projected in the WGS84 international coordinate system. I am currently trying to create a spatial grid in which each cell is centered on predefined spatial points.
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