To utilise a dataset, it is necessary to be able to separately identify its constituent parts. Specifically, AIXM requires this ability to express relationships between features and to identify features that are part of an AIXM message. Unique identifiers associated with each feature instance are used to achieve this. Regarding the unique identifier concepts used, AIXM 4.5 … [Read more...]
AIXM 4.5 vs. AIXM 5 – Coordinate reference systems (CRS) (Part 3b)
For all geometries of aeronautical features a coordinate reference systems (CRS) must be specified. The CRS reference is critical for the correct encoding and processing of AIXM geometries. Without a known CRS, coordinates in the descriptions of a geometry have little meaning. … [Read more...]
AIXM 5.1.1 in a nutshell
In April 2016, so quite a couple of months ago, AIXM 5.1.1 has been released as a minor update of the AIXM 5.1 version, which itself was already out there for 6 years. Although a recommendation is given on the official Aeronautical Information Exchange Model web site (aixm.aero) to use the new version as soon as possible, we haven’t seen any AIXM 5.1.1 data exchange file on the … [Read more...]
AIXM 4.5 vs. AIXM 5 – Geographical Elements (Part 3a)
Most aeronautical features have a geographical aspect, e.g. aerodrome reference point (ARP) is located at a certain position, a power transmission line considered as obstacle forming a line or an airspace which has a horizontal extend described by a polygon. What is the difference between AIXM 4.5 and AIXM 5 when it comes to the modelling of such geographical elements? … [Read more...]
AIXM 4.5 vs. AIXM 5 – Data Scope (Part 2)
Compared to AIXM 4.5, AIXM 5 enlarged the data scope in several areas. The main additional features that have been introduced are related to aerodrome mapping data, terminal procedure data and obstacle data. So what’s new. … [Read more...]