IGN Geodetic Bollards

## Content Data extracted from geodesy sheets *“in an open standard, easily reusable and usable by an automated processing system”* (unfortunately only available as a PDF file on the geodesie.ign.fr website). The Base network has just under 3,000 terminals and landmarks grouped on just over a thousand sites. The Detail network has just over 115,000 terminals and markers grouped on more than 64,000 sites. ### Example (JSON): “'” { “municipality”: “SAINT-LEU-LA-FORET”, “date_fiche”: “2017/01/26”, “department”: VAL-D’OISE (95) “ref_latlon”: «RGF93 (ETRS89) — Ellipsoid: IAG GRS 1980", “ref_proj”: «RGF93 (ETRS89) — Projection: Lambert-93 — Altimetric system: NGF-IGN. “ref_proj_alti”: “NGF-IGN”, “ref_proj_epsg”: 2154, “repears”: [ { “description”: «Borne 1995 in concrete: 18 mm diameter hemispheric brass marker", “ELE”: 106.563, “GPS”: “OK,” “ID”: “206818”, “index”: “a”, “Lat”: 49.005742552777775, “lon”: 2.2484194333333334, “levelling”: “G.C.T3-344-I”, “numero”: “9556301-01”, “precision_alti_max”: 0.005, “precision_plani_max”: 0.01, “sight”: “2015”, “x”: 645012.411, “y”: 6878687.024, “Z”: 62.84 }, { “description”: «Borne 1995 in Polyester-concrete: 25 mm diameter hemispherical marker", “ELE”: 114.722, “GPS”: “OK,” “ID”: “206819”, “index”: “B”, “Lat”: 49.009885402777776, “lon”: 2.2395948194444446, “numero”: “9556301-02”, “precision_alti_max”: 0.1, “precision_plani_max”: 0.05, “sight”: “2014”, “x”: 644371.236, “y”: 6879153.912, “Z”: 71.01 } ], “reseau”: ‘Basic network’, “site_name”: SAINT-LEU-LA-FORET I, “site_num”: “9556301” }, “'” The CSV version contains the same information but denormalised. The CSV file of the Base+ Detail network is gzipped (6 MB, 48 MB uncompressed). ## Extraction The scripts used to extract this data are available on github: https://github.com/cquest/geodesie2data Since the extraction of the data contained in the PDF files is not trivial, **errors may be present**, please report them to https://github.com/cquest/geodesie2data/issues in order to correct the extraction scripts. ## License The IGN also confirmed that these data were under [**Open License**](https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Licence_Ouverte.pdf). If you reuse them do not forget to indicate “source IGN/geodesie.ign.fr” as well as the date of extraction because it is data that evolves over time.