Comparing Global Geocoding Solutions
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The most popular Discrete Global Grids (DGG) are the foundation and practical reference for the most popular Geocoding systems. A "geocode", in this context, is the identifier of a cell on the DGG. The purpose of this page is to offer some samples and conventions to compare geocoding systems, as Geohash, MapCode, PlusCode, etc.
Benchmark places
A map-feature group of near-places (A) and another place (B) far away the first group.
Group.id | Place name and Wikidata-link | scale | ISO lat/long | UTM | Notes |
---|---|---|---|---|---|
A1 | Washington Monument/center | cm² | 38.889475, -77.035244 | 18S 323483 4306480 | The obelisk at Washington DC. Cited as benchmark by cmar.csiro.au/csquares. There are also a report with precise coordinates in 2011 (latitude N 38° 53’ 22.08257 ± 2.0 mm NAD83, longitude W 77° 02’ 06.86428 ± 1.0 mm NAD83). |
A2 | Josephine Shaw Lowell Memorial Fountain (at Manhattan/NY) | ? | 40.754, -73.9841 | 18T 585756 4511946 | Cited as benchmark by Minh Nguyễn 2016 |
A3.1 | Central Park (NY) | 3.4 km² | 40.7825, -73.966111 | 18T 587238 4515127 | Cited as benckmark by ycombinator.com. |
A3.2 | Alexander Hamilton's statue | ~1m² | 40.781028, -73.964556 | 18T 587371 4514965 | Located at Central Park/NY, has granite statue into a ~1×1 m pedestal. |
A3.3 | Delacorte Theater | ~1km² | 40.7801, -73.968767 | 18T 587017 4514858 | Located at Central Park/NY, it is a ~1/3 a of circle of ~30 m radius. |
B.1 | Merlion fountaine | ~30m² | 1.287022, 103.854689 | 48N 372579 142283 | x |
B.2 | Merlion Park | ? | 1.28683, 103.855 | 48N 372614 142262 | x |
C | Rue François-Ier | ~10km² | 48.8679, 2.30497 | 31U 449030 5413004 | Near Champs Élysées, Paris. Size 20×850 m |