The information in this section is also broadly applicable to Edge-matched administrative boundary dataset (COD-EM) information. |
COD-AB (and COD-EM) datasets are categorized as ‘standard’ and ‘enhanced’ CODs.
There is an analogous categorization for Population Statistics Common Operational Datasets (COD-PS).
Enhanced CODs
Enhanced CODs have undergone improved development and quality control. Enhanced COD-AB and COD-EM datasets have been quality controlled and standardized by ITOS (see COD-AB geoservices for more information about ITOS). Enhanced COD-PS datasets have been prepared (and therefore quality controlled and standardized) by UNFPA. Enhanced CODs are identified in HDX datasets views and on their HDX dataset pages with a “COD+” icon.
Standard CODs
Standard COD-ABs are those that are not Enhanced. These include older COD-AB datasets, older COD-PS datasets (not contributed by UNFPA), and all COD-CS datasets.
Standard CODs are identified in HDX dataset views and on their HDX dataset pages with a “COD” icon.
Most new or recently updated COD-AB, COD-EM, and COD-PS datasets are enhanced.
Indicator | Criteria | Comments | Score (for each level) | Instructions |
Metadata | Metadata Score | 5 | ||
Date of dataset | Is the date of the dataset indicated? | 1 | ||
Clear source | Is the data source clearly indicated and defined? | 1 | ||
Clear methodology/comments | Is there methodology or comments contained clarifying information? | 1 | ||
License | Can the dataset be shared? Is the type of license/rights of use defined? | 1 | ||
Spatial dataset | Is there a file for each level? Can a lower level be used to create upper levels? | 1 | ||
Attribute structure | Attribute Score | 12 | ||
Polygon count check | Is the count accurate? (examine against government maps or other sources / wiki / GADM) | 1 | ||
Shp is polygon | Does the shapefile contain only polygons shapes? If not can polygon be created from it easily? (a test should be done) | 1 | ||
No missing AB level names | Are there names in all records? if not can they be identified? | 1 | ||
Clear column names | Can the data be understood? If not is there metadata to explain it? | 1 | ||
Lower levels have higher attributes included | Do the lower admin boundaries have the higher admin boundaries in the shp? If not can they be easily added? | 1 | ||
P-Codes constructed | Do the P-codes incorporate values from higher levels? If not can they be constructed? | 3 | ||
Only unique names | Is there any duplicate names within the level? If there is are the P-codes unique? | 1 | ||
Only unique P-Codes | Is there any duplicate P-codes within the level? | 3 | ||
Parentage checks | Parentage Score | 6 | ||
P-Code parentage check | Does each admin level have upper level P-codes? Is the hierarchy the same between levels? | 3 | ||
Name parentage check | Does each admin level have upper level names? Is the hierarchy the same between levels? | 3 | ||
Spatial checks | Spatial Score | 4 | ||
Geometric nesting | Are there issues with topology? This is a quick check to see if there are topological errors | 2 | ||
Topology errors | Are they some gaps or overlaps within the layers? | 1 | ||
Entire country is covered | Do the different level span the entire country? If part of the country is missing is required? Is an another source able to fill it? | 1 | ||
Link to COD-PS check | Link Score | 3 | ||
AB joins to PS | Did the PS join to AB levels work? | 3 | ||
Other comments | Total Score | 30 |
12-month COD-AB review process
Which of the following applies for each country?
The country administrative structure has changed such that the COD-AB should be updated.
The COD-AB has errors that should be corrected.
New data has been discovered that could improve the COD-AB (such as more accurate boundaries or a deeper administrative level).
The COD-AB requires no changes.