Assignment 5

library(sf)

## Linking to GEOS 3.9.3, GDAL 3.5.2, PROJ 8.2.1; sf_use_s2() is TRUE

library(tigris)

## To enable caching of data, set `options(tigris_use_cache = TRUE)`
## in your R script or .Rprofile.

library(tmap)

## Warning: package 'tmap' was built under R version 4.2.3

## Breaking News: tmap 3.x is retiring. Please test v4, e.g. with
## remotes::install_github('r-tmap/tmap')

library(raster)

## Loading required package: sp

#Q1
bexar_tracts<- tracts(state = "TX", county = "Bexar",cb=T)

## Retrieving data for the year 2021

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Bondline <- st_read(dsn = "C:/Users/salom/OneDrive/Desktop/BondProjectLines2017/BondProjectLines2017/BondProjectLines2017.shp")   

## Reading layer `BondProjectLines2017' from data source 
##   `C:\Users\salom\OneDrive\Desktop\BondProjectLines2017\BondProjectLines2017\BondProjectLines2017.shp' 
##   using driver `ESRI Shapefile'
## Simple feature collection with 69 features and 24 fields
## Geometry type: MULTILINESTRING
## Dimension:     XY
## Bounding box:  xmin: 2078269 ymin: 13665110 xmax: 2168346 ymax: 13783530
## Projected CRS: NAD83 / Texas South Central (ftUS)

Bondline <- st_transform(Bondline, crs=4326)

buffer_distance <- 0.01
Bondline <-st_buffer(Bondline, dist = buffer_distance)

tm_shape(bexar_tracts)+
  tm_borders()+
  tm_shape(Bondline)+
  tm_borders(lwd = 2, col = "Green")+
  tm_layout(frame = F)

#Q2
Libraries <- st_read(dsn= "C:/Users/salom/OneDrive/Desktop/Libraries/Libraries/Libraries.shp")

## Reading layer `Libraries' from data source 
##   `C:\Users\salom\OneDrive\Desktop\Libraries\Libraries\Libraries.shp' 
##   using driver `ESRI Shapefile'
## Simple feature collection with 30 features and 9 fields
## Geometry type: POINT
## Dimension:     XY
## Bounding box:  xmin: 2075828 ymin: 13669240 xmax: 2170361 ymax: 13779280
## Projected CRS: NAD83 / Texas South Central (ftUS)

Libraries <- st_transform(Libraries, crs=4326)

tmap_mode("view")

## tmap mode set to interactive viewing

tm_shape(bexar_tracts) +
  tm_borders() +  # Add borders for polygons (customize as needed)
  tm_shape(Libraries) +
  tm_dots(size = 0.02, col = "red", alpha = 0.7) +  # Customize point appearance
  tm_basemap() +
  tm_layout(title = "SA Libraries", frame = FALSE)

#Q3
LST <- raster('C:/Users/salom/Downloads/LC09_028040_20230826.tif')
LST <- setMinMax(LST)

LST

## class      : RasterLayer 
## dimensions : 7779, 7542, 58669218  (nrow, ncol, ncell)
## resolution : 30, 30  (x, y)
## extent     : 311265, 537525, 3076545, 3309915  (xmin, xmax, ymin, ymax)
## crs        : +proj=utm +zone=14 +datum=WGS84 +units=m +no_defs 
## source     : LC09_028040_20230826.tif 
## names      : LST 
## values     : 272.8423, 334.4377  (min, max)

#Q4
LST <- LST-273.15
plot(LST, main="LST of Dallas") # add title with main

#Q5
image(LST, zlim=c(40,100))