OpenSidewalkMap Data Quality Tool
Interactive QA Webmap
Explore all generated detections clustered on a map.
Open Quality Assurance Map
This Section is dedicated to find errors in the Features of interest in the Context of OSWM project.
In some cases it's a clear mistake, but it can be just a mispelling or an uncommon value
currently, there are the categories presented at the table,
each one with the number of occurrences that are item-wise detailed at each link
you can post suggestions at repo "issues" section
| Category | sidewalks | crossings | kerbs | other_footways | ISO 19157 Type |
|---|---|---|---|---|---|
| improper_keys | 25 | 255 | 9772 | 0 | Thematic Accuracy → Non-quantitative Attribute Accuracy |
| uncanny_keys | 313 | 11 | 4194 | 0 | Thematic Accuracy → Non-quantitative Attribute Accuracy |
| keys_without_wiki | 8 | 9 | 4 | 263 | Thematic Accuracy → Non-quantitative Attribute Accuracy |
| replaceable_values | 0 | 1422 | 0 | 0 | Thematic Accuracy → Non-quantitative Attribute Accuracy |
| wrong_mispelled_or_unlisted_values | 12 | 21 | 188 | 1002 | Thematic Accuracy → Non-quantitative Attribute Accuracy |
| invalid_characters | 2 | 2 | 0 | 86 | Logical Consistency → Format Consistency |
| older_than_five_years | 43 | 12 | 37 | 3931 | Temporal Accuracy → Temporal Validity |
| missing_tags | 14853 | 7071 | 0 | 13925 | Completeness → Omission (missing data) |
| disjointed_geometries | 0 | 102 | 68 | 0 | Logical Consistency → Topological Consistency |
| improper_geometries | 3539 | 0 | 1647 | 0 | Logical Consistency → Conceptual Consistency |
| crossings_lacking_kerbs | 0 | 10135 | 0 | 0 | Logical Consistency → Topological Consistency |
| kerb_on_top_of_non_crossing | 0 | 0 | 1326 | 0 | Logical Consistency → Topological Consistency |
| Totals: | 18795 | 19040 | 17236 | 19207 |
The information here can be outdated
here you can check the last update and read more about this
📐 ISO 19157:2013 — Data Quality Reference
Each quality category is classified according to ISO 19157:2013. The classification uses the standard's 5 main quality elements:
Thematic Accuracy
• Non-quantitative Attribute Accuracy
• Classification Correctness
• Quantitative Attribute Accuracy
Logical Consistency
• Topological Consistency
• Conceptual Consistency
• Format Consistency
• Domain Consistency
Temporal Accuracy
• Temporal Validity
• Temporal Consistency
• Accuracy of a Time Measurement
Positional Accuracy
• Absolute or External Accuracy
• Relative or Internal Accuracy
• Gridded Data Position Accuracy
Completeness
• Commission (excess data)
• Omission (missing data)
Note: Completeness is evaluated in a zonal-based fashion in the OSWM Completeness Map.
Bold sub-elements are currently used in the per-feature quality checks.
Explaining Each category:
improper_keys : Keys that (almost certainly) shouldn't be used at that feature type — ISO 19157: Thematic Accuracy → Non-quantitative Attribute Accuracy
uncanny_keys : Keys that may be OK in some specific situations, but may be a mistake — ISO 19157: Thematic Accuracy → Non-quantitative Attribute Accuracy
keys_without_wiki : Keys that may be wrong, because there's no wiki article for it — ISO 19157: Thematic Accuracy → Non-quantitative Attribute Accuracy
replaceable_values : values that are not wrong, but there's a better option that is in the commentary — ISO 19157: Thematic Accuracy → Non-quantitative Attribute Accuracy
wrong_mispelled_or_unlisted_values : Values that are probably wrong, but they may be mispelled or just unlisted — ISO 19157: Thematic Accuracy → Non-quantitative Attribute Accuracy
invalid_characters : characters that should not be in the value or in the key — ISO 19157: Logical Consistency → Format Consistency
older_than_five_years : Features that haven't been updated in over five years, potentially outdated. — ISO 19157: Temporal Accuracy → Temporal Validity
missing_tags : Features that are missing important tags — ISO 19157: Completeness → Omission (missing data)
disjointed_geometries : Features with geometries that are not connected to others, i.e. disjointed. This is generally a special matter of concern for crossings, kerbs and sidewalks — ISO 19157: Logical Consistency → Topological Consistency
improper_geometries : Features with geometries (more specifically geometry types) that are incompatible with the main tags — ISO 19157: Logical Consistency → Conceptual Consistency
crossings_lacking_kerbs : Crossings that intersect fewer than 2 kerbs. — ISO 19157: Logical Consistency → Topological Consistency
kerb_on_top_of_non_crossing : Kerbs that do not intersect any crossing geometry. — ISO 19157: Logical Consistency → Topological Consistency