Visualise GHA boundary data

• This scripts produces a cleaned jurisdictional map for Ghana, and shows the different levels included.

• Our jurisdictional map contains three levels of jurisdictions (country -> region -> district).

• Note: The reform of the late 1980s subdivided the regions of Ghana into 110 districts, where local district assemblies should deal with the local administration. By 2006, an additional 28 districts were created by splitting some of the original 110, bringing their number up to 138. In February 2008, there were more districts created and some were upgraded to municipal status. This brought the final number to 170 districts in Ghana. Since then, a further 46 districts have been added since 28 June 2012 bringing the total to 216 districts. (From: https://en.wikipedia.org/wiki/Districts_of_Ghana).

• In 2018, a referendum created seven new regions (and abolished one, Brong Ahafo), increasing the number from 10-16.

• Note: the CIAT production data we have is for 137 districts (i.e. possibly uses the 2006 boundaries).

• I’ve created a unique district level codes by combining the region ISO codes with the district ID number in the original district shapefile.

##   LVL_2_CODE LVL_2_NAME LVL_3_CODE       LVL_3_NAME
## 1      GH-WP    WESTERN   GH-WP101           JOMORO
## 2      GH-WP    WESTERN   GH-WP102       ELLEMBELLE
## 3      GH-WP    WESTERN   GH-WP103       NZEMA EAST
## 4      GH-WP    WESTERN   GH-WP104      AHANTA WEST
## 5      GH-WP    WESTERN   GH-WP105 SEKONDI TAKORADI
## 6      GH-WP    WESTERN   GH-WP106            SHAMA

• A name-code dictionary is available in S3: trase-cocoa ~ data/4-METADATA/DICTIONARIES/GHANA/JURISDICTION_DIC.csv

Level 1

• Country

## [1] "GHANA"

Level 2

• Regions
• 16 regions.

Level 3

• Districts
• The 16 regions are divided in 216 districts.

Level 4

• Settlements
• We don’t have boundary data at this level.

## Writing layer `filecb84bd82db0' to data source 
##   `C:\Users\cerenier\AppData\Local\Temp\RtmpaWQ6UB\filecb84bd82db0.geojson' using driver `GeoJSON'
## Writing 216 features with 6 fields and geometry type Multi Polygon.

## File size is 33390228. Consider setting 'multipart = TRUE'.