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# Auto detect text files and perform LF normalization | ||
* text=auto |
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GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]] |
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<?xml version="1.0" encoding="UTF-8"?> | ||
<metadata xml:lang="en"><Esri><CreaDate>20200813</CreaDate><CreaTime>23083700</CreaTime><ArcGISFormat>1.0</ArcGISFormat><SyncOnce>TRUE</SyncOnce><DataProperties><lineage><Process ToolSource="c:\program files (x86)\arcgis\desktop10.4\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField" Date="20200717" Time="180529">CalculateField CMIP6_land2 V4 !FID! PYTHON_9.3 #</Process><Process ToolSource="c:\program files (x86)\arcgis\desktop10.4\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField" Date="20200717" Time="180540">CalculateField CMIP6_land2 V4 !FID!+1 PYTHON_9.3 #</Process></lineage></DataProperties></Esri></metadata> |
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SampleData-master/Largescale_geospatial_analysis_2022.html
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SampleData-master/Largescale_geospatial_analysis_2023.html
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# SampleData-master | ||
Sample dataset for large-scale data visualization workshop. |
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GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]] |
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SampleData-master/USA_states/cb_2018_us_state_5m.shp.ea.iso.xml
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mat2ras=function(mat, Longitude, Latitude, plot_ind){ | ||
# Converts a matrix to raster using Lat-long vectors and 2-d matrix of the dataset. | ||
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#Import libraries | ||
require(reshape2) | ||
require(maps) | ||
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row.names(mat)=Longitude #Assign rownames as Longitude | ||
colnames(mat)=Latitude #Assign colnames as Latitudes | ||
xyz=melt(mat) # Create an X-Y-Z dataframe | ||
ncol=length(Longitude) | ||
nrow= length(Latitude) | ||
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colnames(xyz)= c("x", "y", "z") | ||
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# Create a sample raster | ||
dat = raster( | ||
xmn = 1, xmx = ncol, | ||
ymn = 1, ymx = nrow, | ||
nrows = nrow, | ||
ncols = ncol, | ||
vals = xyz$z) | ||
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library(maps) | ||
# specify CRS to be used | ||
crs.latlon = CRS("+proj=longlat +datum=WGS84") | ||
nrow = dim(dat)[1] | ||
ncol = dim(dat)[2] | ||
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# get extent of the domain | ||
ext = extent(xyz[, c('x', 'y')]) | ||
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# create a raster for extent with nrow and ncol | ||
rast = raster( | ||
ext, nrow = nrow, ncol = ncol, | ||
crs = crs.latlon) | ||
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# rasterize the data values | ||
rast = rasterize( | ||
xyz[, c('x', 'y')], rast, | ||
xyz[, 'z'], fun=mean) | ||
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if (plot_ind==TRUE){ | ||
plot(rast) | ||
} | ||
return(rast) | ||
} |
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robin_ras=function(ras, map_col,name,brk,lim,na.rm=T){ | ||
############################################# | ||
# ====================================================================================== | ||
# Create a simple world map in Robinson projection with labeled graticules using ggplot | ||
# ====================================================================================== | ||
#Source code edited from: | ||
#https://seethedatablog.wordpress.com/2016/12/23/r-simple-world-map-robinson-ggplot/ | ||
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# Set a working directory with setwd() or work with an RStudio project | ||
# __________ Set libraries | ||
library(rgdal) # for spTransform() & project() | ||
library(ggplot2) # for ggplot() | ||
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# __________ Load ready to use data from GitHub | ||
load(url("https://github.com/valentinitnelav/RandomScripts/blob/master/NaturalEarth.RData?raw=true")) | ||
# This will load 6 objects: | ||
# xbl.X & lbl.Y are two data.frames that contain labels for graticule lines | ||
# They can be created with the code at this link: | ||
# https://gist.github.com/valentinitnelav/8992f09b4c7e206d39d00e813d2bddb1 | ||
# NE_box is a SpatialPolygonsDataFrame object and represents a bounding box for Earth | ||
# NE_countries is a SpatialPolygonsDataFrame object representing countries | ||
# NE_graticules is a SpatialLinesDataFrame object that represents 10 dg latitude lines and 20 dg longitude lines | ||
# (for creating graticules check also the graticule package or gridlines fun. from sp package) | ||
# (or check this gist: https://gist.github.com/valentinitnelav/a7871128d58097e9d227f7a04e00134f) | ||
# NE_places - SpatialPointsDataFrame with city and town points | ||
# NOTE: data downloaded from http://www.naturalearthdata.com/ | ||
# here is a sample script how to download, unzip and read such shapefiles: | ||
# https://gist.github.com/valentinitnelav/a415f3fbfd90f72ea06b5411fb16df16 | ||
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# __________ Project from long-lat (unprojected data) to Robinson projection | ||
# spTransform() is used for shapefiles and project() in the case of data frames | ||
# for more PROJ.4 strings check the followings | ||
# http://proj4.org/projections/index.html | ||
# https://epsg.io/ | ||
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PROJ <- "+proj=robin +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs" | ||
# or use the short form "+proj=robin" | ||
NE_countries_rob <- spTransform(NE_countries, CRSobj = PROJ) | ||
NE_graticules_rob <- spTransform(NE_graticules, CRSobj = PROJ) | ||
NE_box_rob <- spTransform(NE_box, CRSobj = PROJ) | ||
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# project long-lat coordinates for graticule label data frames | ||
# (two extra columns with projected XY are created) | ||
prj.coord <- rgdal::project(cbind(lbl.Y$lon, lbl.Y$lat), proj=PROJ) | ||
lbl.Y.prj <- cbind(prj.coord, lbl.Y) | ||
names(lbl.Y.prj)[1:2] <- c("X.prj","Y.prj") | ||
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prj.coord <- rgdal::project(cbind(lbl.X$lon, lbl.X$lat), proj=PROJ) | ||
lbl.X.prj <- cbind(prj.coord, lbl.X) | ||
names(lbl.X.prj)[1:2] <- c("X.prj","Y.prj") | ||
pr <- projectRaster(ras, crs=PROJ, method='bilinear',res=36000) | ||
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# IMPORT SHAPEFILE | ||
cropped <- crop(x = pr, y = extent(NE_countries_rob)) | ||
masked <- mask(x = cropped, mask = NE_countries_rob) | ||
#plot(masked) | ||
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test_spdf <- as(masked, "SpatialPixelsDataFrame") | ||
test_df <- as.data.frame(test_spdf) | ||
colnames(test_df) <- c("value", "x", "y") | ||
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# __________ Plot layers | ||
plt=ggplot() + | ||
# add Natural Earth countries projected to Robinson, give black border and fill with gray | ||
geom_polygon(data=NE_countries_rob, aes(long,lat, group=group), | ||
colour="black", fill="gray80", size = 0.25) + | ||
# Note: "Regions defined for each Polygons" warning has to do with fortify transformation. Might get deprecated in future! | ||
# alternatively, use use map_data(NE_countries) to transform to data frame and then use project() to change to desired projection. | ||
# add Natural Earth box projected to Robinson | ||
geom_polygon(data=NE_box_rob, aes(x=long, y=lat), colour="black", fill="transparent", size = 0.25) + | ||
# add graticules projected to Robinson | ||
geom_path(data=NE_graticules_rob, aes(long, lat, group=group), linetype="dotted", color="grey50", size = 0.25) + | ||
# add graticule labels - latitude and longitude | ||
geom_text(data = lbl.Y.prj[c(TRUE, FALSE),], aes(x = X.prj, y = Y.prj, label = lbl), color="grey50", size=2.5) + | ||
geom_text(data = lbl.X.prj[c(TRUE, FALSE),], aes(x = X.prj, y = Y.prj, label = lbl), color="grey50", size=2.5) + | ||
# the default, ratio = 1 in coord_fixed ensures that one unit on the x-axis is the same length as one unit on the y-axis | ||
coord_fixed(ratio = 1) + | ||
geom_tile(data=test_df, aes(x=x, y=y, fill=value),alpha=1)+ | ||
scale_fill_gradientn(colors= | ||
rev(map_col), | ||
name = " ", | ||
na.value = "transparent", | ||
#labels=c("Minimum",0.5,"Maximum"), | ||
breaks=brk, | ||
limits=lim)+ | ||
geom_polygon(data=NE_countries_rob, aes(long,lat, group=group), | ||
colour="black", fill="transparent", size = 0.25) + | ||
# remove the background and default gridlines | ||
theme_void()+ | ||
theme(plot.title = element_text(hjust = 0.5,size =12, face = "bold"), | ||
legend.position="bottom", | ||
legend.key.width=unit(1.8, "cm"), | ||
legend.key.height=unit(0.4, "cm"), | ||
legend.text=element_text(size=16))+ | ||
ggtitle(name) | ||
plt | ||
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# REFERENCES: | ||
# This link was useful for graticule idea | ||
# http://stackoverflow.com/questions/38532070/how-to-add-lines-of-longitude-and-latitude-on-a-map-using-ggplot2 | ||
# Working with shapefiles, projections and world maps in ggplot | ||
# http://rpsychologist.com/working-with-shapefiles-projections-and-world-maps-in-ggplot | ||
return(plt) | ||
} | ||
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