Update README.md

README.md

@@ -19,9 +19,61 @@ The container makes available a MariaDB instance with the full database on airpo
 ---
 ## Specifications
 
+
+**Europe**
+Airports location
+- 2006:
+
+The key for AIRP_PASS_ is as follows:
+| Value         | Description     |
+|--------------|-----------|
+|0 |	Less than 15 000 passengers during 2004|
+|1 |	15 000 to 150 000 passengers during 2004|
+|2 |	150 000 to 1 500 000 passengers during 2004|
+|3 |	More than 1 500 000 passengers during 2004|
+|9 |	Regulation not applicable|
+
+- 2013:
+
+The key for AIRP_PASS_ is as follows:
+| Value         | Description     |
+|--------------|-----------|
+|0 |	Less than 150000 passengers per year|
+|1 |	150000 to 1500000 passenger per year|
+|2 |	More than 1500000 passengers per year|
+|9 |	Information not available|
+
+AIRP_ICAO_
+is the airport ICAO code
+
+**US**
+Relevant data in aviation facilities Shapefile (annual operations + ICOA ref):
+|Field|Title| Description|
+|---|---|---|
+|COMMERCIAL | COMMERCIAL SERVICES | SCHEDULED OPERATIONS BY CAB-CERTIFICATED CARRIERS OR INTRASTATE CARRIERS|
+|COMMUTER_O | COMMUTER SERVICES | SCHEDULED COMMUTER/CARGO CARRIERS|
+|AIR_TAXI_O | AIR TAXI | AIR TAXI OPERATORS CARRYING PASSENGERS, MAIL, OR MAIL FOR REVENUE|
+|LOCAL_OPS | GENERAL AVIATION LOCAL OPERATIONS | THOSE OPERATING IN THE LOCAL TRAFFIC PATTERN OR WITHIN A 20-MILE RADIUS OF THE AIRPORT|
+|ITNRNT_OPS | GENERAL AVIATION ITINERANT OPERATIONS | THOSE GENERAL AVIATION OPERATIONS (EXCLUDING COMMUTER OR AIR TAXI) NOT QUALIFYING AS LOCAL||
+|MIL_ACFT_O | MILITARY AIRCRAFT OPERATIONS ||
+|ANNUAL_OPS | END DATE | 12-MONTH ENDING DATE ON WHICH ANNUAL OPERATIONS DATA IN ABOVE SIX FIELDS IS BASED (MM/DD/YYYY)|
+|---|---|---|
+|ICAO_ID|ICAO|ICAO airport code|
+
 ---
 ## Notes
 
+**Europe**
+Data source:
+https://ec.europa.eu/eurostat/web/gisco/geodata/reference-data/transport-networks
+Air passenger transport by main airports in each reporting country, Monthly from 1993 to 2022, passengers + flights
+https://ec.europa.eu/eurostat/databrowser/view/avia_paoa/default/table?lang=en
+
+**US**
+Aviation facilities:
+https://opendata.arcgis.com/api/v3/datasets/c3ca6a6cdcb242698f1eadb7681f6162_0/downloads/data?format=shp&spatialRefId=3857&where=1%3D1
+
+
 ---
 ### Authors
 Riccardo Boero - ribo@nilu.no