Script to download shapefiles from 2020 Mexican census (including demographic data)

scince_2020.sh

#!/usr/bin/env bash
# Author: Diego Valle-Jones
# Web: http://www.diegovalle.net
# Script to download shapefiles from 2020 Mexican census (including demographic data)
# tested on ubuntu 20.04

# Exit on error, undefined and prevent pipeline errors
set -euo pipefail
IFS=$'\n\t'
# The directory from which the script is running
readonly LOCAL_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"

TEMP_DIR="$(mktemp -d)"

# index starts at zero
declare -a states=("national" "ags" "bc" "bcs" "camp" "coah" "col"
                   "chis" "chih" "cdmx" "dgo" "gto" "gro" "hgo" "jal"
                   "mex" "mich" "mor" "nay" "nl" "oax" "pue" "qro"
                   "qroo" "slp" "sin" "son" "tab" "tamps" "tlax" "ver"
                   "yuc" "zac");

download_states() {
    mkdir -p "$LOCAL_DIR"/scince_2020
    for i in {0..32}
    do
        echo "Downloading ${states[$i]}..."
        # The INEGI uses a leading zero for all one digit numbers
        if [ "$i" -lt 10 ]
        then
            FILENUM="0$i"
        else
            FILENUM="$i"
        fi
        curl -sLo "$TEMP_DIR"/scince_$FILENUM.exe \
             https://gaia.inegi.org.mx/scince2020desktop/$FILENUM/SCINCE2020_DATOS_$FILENUM.exe
        (cd "$TEMP_DIR" && \
             "$TEMP_DIR"/innoextract-1.9-linux/innoextract \
                        --lowercase \
                        --silent "$TEMP_DIR"/scince_$FILENUM.exe)
        find "$TEMP_DIR"/app -depth -type f -regextype posix-extended \
             -regex '.*\.(dbf|cpg|prj|shp|rtree|shx)' \
             -execdir sh -c 'mv $1 "$2"_$(basename $1)' _ {} "${states[$i]}" \;
        DIR=$(find "$TEMP_DIR"/app -mindepth 1 -maxdepth 1 -type d -name '[0-9]*' -print)
        mv "$DIR" "$LOCAL_DIR/scince_2020/${states[$i]}"
        rm -rf "$TEMP_DIR"/app "$TEMP_DIR"/tmp
     done
}

main() {
    # Download innoextract 1.9
    curl -sLo "$TEMP_DIR"/inno.tar.xz https://github.com/dscharrer/innoextract/releases/download/1.9/innoextract-1.9-linux.tar.xz
    tar -xf "$TEMP_DIR"/inno.tar.xz --directory "$TEMP_DIR"
    # Download shapefiles
    download_states
    rm -rf "$TEMP_DIR"
}

main

# -6 Datos reservados por confidencialidad 
# -7 No disponible (cuando toda el área tiene viviendas pendientes)
# -8 No disponible (Cuando toda el área tiene sólo viviendas deshabitadas o de uso temporal)
# -9 No aplica (Cuando no es calculable)