ICARD 5 LNC and Operational Data ICAO GIS

ICARD 5 LNC and Operational Data ICAO GIS analysis

Overview We receive new Waypoint Data from our client l The new Waypoint Data is converted into a. shp format and integrated in the original data in order to construct updated map with most key layers visualized… l The new ICARD 5 LNC ICAO database layer is compared with the Operational Data layer l Comparison findings: Many discrepancies between the two data. l

ICAO 5 LNC History? Originally States used ”The Green Book” to choose and reserve a 5 LNC. The consequence: many duplicates between regions and coordinate mistakes recorded in the 5 LNC data base. l The calculation of the coordinate location at that time did not follow a geodesic procedure. Regularly the coordinates of a 5 LNC were grid intersections on large scale map. The Degrees Minutes and Seconds were read and recorded manually using a divided compass tool… l Result: 5 LNC data is inaccurate with varied coordinate precision between 2 and 6 digits. Records are very different to the real world operational coordinate data. l l The term Coordinate Precision refers to the mathematical exactness of a coordinate and is based on the possible number of significant digits that can be stored for each coordinate.

Detail: Coordinate precision Difference between 2 and 6 digits ICARD 5 LNC Database with precision of 2 digits Waypoint database with precision of 6 digits Note: Route intersects Waypoint with coordinate precision of 6

Detail: Duplicate coordinate Point GAMOT with error of 1 NM ICARD 5 LNC database precision of 6 Waypoint database precision of 6 Note: Green Routes intersects waypoint GAMOT with coordinate precision of 6.

Detail: Duplicate Coordinate Precision between points BOSAD and DATAN ICARD 5 LNC database precision of 2 Waypoint database precision 6 ICARD 5 LNC database precision of 6 Green Route intersects the waypoint with coordinate precision of 6 Waypoint database Precision of 6

Detail: Coordinate Duplicate Point PAPIX with error of 34 NM ICARD 5 LNC coordinate precision of 6 Note: Route intersects waypoint with precision of 6

Detail: Coordinate Duplicate Point ISALA error of 122 NM ICARD 5 LNC coordinate precision of 6 Note: Route intersects waypoints with precision of 6

Detail: Missing points in ICARD 5 LNC Missing Waypoint on Upper Route shown in RED Upper Route waypoints with precision of 6 ICARD 5 LNC waypoints with precision of 6 Green Routes intersect waypoints with precision of 6

Detail: Missing points in ICARD 5 LNC Missing Waypoints on Upper Routes shown in RED Upper Route waypoints with precision of 6 ICARD 5 LNC waypoints with precision of 6 Green Routes intersect waypoints with precision of 6

Detail: Missing points in ICARD 5 LNC Missing Lower Route waypoints shown in BLUE Lower Route waypoints with precision of 6 ICARD 5 LNC precision of 6 Green Routes intersect waypoints with precision of 6

Detail: Missing points in ICARD 5 LNC Missing waypoints of Upper and Lower Routes shown in RED, BLUE and GREEN Upper Route waypoints Lower Route waypoints ICARD 5 LNC waypoints Green Routes intersect waypoints with precision of 6

Detail: To access the ICARD 5 LNC analysis on the ICAO GIS server: Type in your Browser: l http: //192. 206. 28. 81/ICARD 5 LNC l Zoom to an area on map, example, Senegal (Dakar) l Locate Table of contents on left side of screen l Click on the group layer : Data. Base AIP comparison l Click on the 5 LNC missing layer l Click on the ICARD-WAYPT-DIST layer l Zoom in random to different points …

Detail: ICARD -WAYPT-DIST layer Brown lines shown reflect the distances measured between the ICARD 5 LNC and Operational data waypoints

Detail: zoom of ICARD –WAYPT-DIST layer Brown lines shown reflect the distances measured between the ICARD 5 LNC and Operational data waypoints

Detail: 5 LNC missing UPP layer

Detail: 5 LNC missing Lower layer

Detail: ICAO to do list ICARD 5 LNC prototype Version 2. 0 GIS analysis • List all the ICARD 5 LNC IN THE DUP that do not intersect true operational routes and list others that require corrections • List ICARD 5 LNC waypoints with incorrect coordinate precision when compared with the operational waypoint data • List all the ICARD 5 LNC with the incorrect coordinates when compared to the operational waypoints data, the outcome is a new kind of recorded duplicate. • List missing waypoints in upper and lower route data with non pronounceable 5 letter radio approach to be incorporated in the ICARD 5 LNC ICAO using the GIS SPACIAL ANALYSTE software.

Detail: ICAO to do list remarks ICARD 5 LNC prototype Version 2. 0 GIS analysis • List all the ICARD 5 LNC IN THE DUP that do not intersect true operational routes and list others that require corrections (List to be divided by region or state? ) • List ICARD 5 LNC waypoints with incorrect coordinate precision when compared with the operational waypoint data (List to be divided by region or state? ) • List all the ICARD 5 LNC with incorrect coordinates when compared to the operational waypoints data, the outcome is a new kind of recorded duplicate. (List to be divided by region or state? ) • List missing waypoints in upper and lower route data with non pronounceable 5 letter radio approach to be incorporated in the ICARD 5 LNC ICAO using the GIS Spacial Analyst software. (List to be divided by region or state? )

Questions and Comments To create an effective ICARD INITIALISATION • We must correct the present ICARD 5 LNC DATABASE following measures proposed in the “ICAO to do list” Compare complete ICARD 5 LNC data with respect to the existing operational data and considering coordinate precision, duplicates and other found errors. • Verify ICARD 5 LNC waypoints that intersect operational route data • Create a list of omitted waypoints along upper and lower routes with non pronounceable 5 letter radio approach to be incorporated in the ICARD 5 LNC ICAO using the GIS Spatial Analyst software.

Questions To create an effective ICARD INITIALISATION • • WHO should take the decision to correct the present ICARD 5 LNC DATABASE ? ICAO HQ Many thanks to Jerome Guevin Jean Michel Galais And Nikki Goldschmid Created by SAST Gilbert Lasnier Gis Officer