ID:	AIXM-338
target version:	AIXM 5.2
version:	1.0
last updated:	17 AUG 2018
status:	APPROVED

Description

Add new codes and refine definitions for existing codes in the codelist for CodeSurfaceConditionBaseType.

Rationale for change

See https://aixmccb.atlassian.net/browse/AIXM-294

The current allowable values for the SurfaceCharacteristics.surfaceCondition attribute are insufficiently defined and do not cover all possible situations. Improved definitions of the existing codes and additional values are necessary, which would avoid the frequent use of OTHER values as a workaround.

As there are no ICAO SARPS that could be used as a reference for this list of values, the FAA circular AC 150/5200-35a was used as a basis for the improved list of values.

Impact assessment

[FWD_MAP_1:1] Data mapping is possible and no data loss occurs when data is exchanged from a system (A) that uses AIXM 5.1.1 for output towards a system (B) that uses AIXM 5.2 for input.

[BWD_MAP_1:1] Data mapping is possible and no data loss occurs when data is exchanged from a system (B) that uses AIXM 5.2 for output towards a system (A) that uses AIXM 5.1.1 for input.

Change Proposal details

In the UML model, add the following codes to CodeSurfaceConditionBaseType:

EXCELLENT (definition: New pavement or pavement with no cracks or a few hairline cracks)
FAILED (definition: Widespread severe cracking and distortion over 5 cm (2 inches). Alligator cracking over 20% or more and widespread vegetation growth in the pavement cracks. Slabs are extensively cracked and shattered with severe spalling and faulting over 1 cm (1/2 inch))

The new values are visible in the UML class diagram at the right.

In addition, update the definitions for the following existing codes in CodeSurfaceConditionBaseType:

GOOD (definition: Some cracking of the pavement. Cracks are generally spaced more than 15 m (50 feet) apart. Less than 10% of the cracks and joints need sealing. There is minimal or slight raveling. There is no distortion, and the patches are in good condition).
FAIR (definition: Some cracking and raveling. Cracks are generally spaced less than 15 m (50 feet) apart. Joint and crack sealing is needed on 10% to 25% of the cracks and joints. There is isolated alligator cracking, the patches are in poor condition, and/or there are crack settlements up to 2.5 cm (1 inch)).
POOR (definition: Widespread, open, unsealed cracks and joints. There are cracks over 1 cm (½-inch) wide with raveling in 25% of the cracks. Cracks are generally spaced 1.5 m to 15 m (5 to 50 feet) apart with surface and slab spalling. Alligator cracking or patches are in poor condition and cover up to 20% of the surface or there is vegetation through the cracks and joints).

Mapping AIXM 5.1.1 to AIXM 5.2 (forward)

The following algorithm shall be applied:

For each SurfaceCharacteristics.surfaceCondition that has the value ”OTHER:EXCELLENT”:

replace the value with “EXCELLENT”

For each SurfaceCharacteristics.surfaceCondition that has the value ”OTHER:FAILED”:

replace the value with “FAILED”

Note that transformation rules are applicable to new values; no transformation would be needed for definition changes.

Mapping AIXM 5.2 to AIXM 5.1.1 (backward)

The following algorithm shall be applied:

For each SurfaceCharacteristics.surfaceCondition that has the value “EXCELLENT”:

replace the value with “OTHER:EXCELLENT”

For each SurfaceCharacteristics.surfaceCondition that has the value “FAILED”:

replace the value with “OTHER:FAILED”

Note: that transformation rules are applicable to new values; no transformation would be needed for definition changes.

Mapping example

(Note: for mapping test data see: https://github.com/aixm/mapping_52_511/tree/master/AIXM-338)

AIXM 5.2	AIXM 5.1(.1)
message:AIXMBasicMessage message:hasMember Runway gml:identifier = 9e51668f-bf8a-4f5b-ba6e-27087972b9b8 timeSlice RunwayTimeSlice gml:validTime gml:TimePeriod gml:beginPosition = 2017-07-01T00:00:00Z gml:endPosition = interpretation = BASELINE sequenceNumber = 2 featureLifetime gml:TimePeriod gml:beginPosition = 2009-01-01T00:00:00Z gml:endPosition = designator = 09L/27R type = RWY nominalLength = 2800.0 M lengthAccuracy = 1 M nominalWidth = 45.0 M widthAccuracy = 1 M lengthStrip = 2920.0 M widthStrip = 300.0 M surfaceProperties SurfaceCharacteristics composition = CONC surfaceCondition = EXCELLENT classPCN = 80 pavementTypePCN = RIGID pavementSubgradePCN = B maxTyrePressurePCN = W evaluationMethodPCN = TECH message:hasMember Taxiway gml:identifier = 78396f68-9c03-438a-a6b4-331157b1a79c timeSlice TaxiwayTimeSlice gml:validTime gml:TimePeriod gml:beginPosition = 2017-07-01T00:00:00Z gml:endPosition = interpretation = BASELINE sequenceNumber = 2 featureLifetime gml:TimePeriod gml:beginPosition = 2013-04-23T12:00:00Z gml:endPosition = designator = B width = 23.0 M surfaceProperties SurfaceCharacteristics composition = CONC surfaceCondition = FAILED classPCN = 80 pavementTypePCN = RIGID pavementSubgradePCN = B maxTyrePressurePCN = W evaluationMethodPCN = TECH ...	message:AIXMBasicMessage message:hasMember Runway gml:identifier = 9e51668f-bf8a-4f5b-ba6e-27087972b9b8 timeSlice RunwayTimeSlice gml:validTime gml:TimePeriod gml:beginPosition = 2017-07-01T00:00:00Z gml:endPosition = interpretation = BASELINE sequenceNumber = 2 featureLifetime gml:TimePeriod gml:beginPosition = 2009-01-01T00:00:00Z gml:endPosition = designator = 09L/27R type = RWY nominalLength = 2800.0 M lengthAccuracy = 1 M nominalWidth = 45.0 M widthAccuracy = 1 M lengthStrip = 2920.0 M widthStrip = 300.0 M surfaceProperties SurfaceCharacteristics composition = CONC surfaceCondition = OTHER:EXCELLENT classPCN = 80 pavementTypePCN = RIGID pavementSubgradePCN = B maxTyrePressurePCN = W evaluationMethodPCN = TECH message:hasMember Taxiway gml:identifier = 78396f68-9c03-438a-a6b4-331157b1a79c timeSlice TaxiwayTimeSlice gml:validTime gml:TimePeriod gml:beginPosition = 2017-07-01T00:00:00Z gml:endPosition = interpretation = BASELINE sequenceNumber = 2 featureLifetime gml:TimePeriod gml:beginPosition = 2013-04-23T12:00:00Z gml:endPosition = designator = B width = 23.0 M surfaceProperties SurfaceCharacteristics composition = CONC surfaceCondition = OTHER:FAILED classPCN = 80 pavementTypePCN = RIGID pavementSubgradePCN = B maxTyrePressurePCN = W evaluationMethodPCN = TECH ...

AIXM 5.2

AIXM 5.1(.1)

message:AIXMBasicMessage

message:hasMember

Runway

gml:identifier = 9e51668f-bf8a-4f5b-ba6e-27087972b9b8

timeSlice

RunwayTimeSlice

gml:validTime

gml:TimePeriod

gml:beginPosition = 2017-07-01T00:00:00Z

gml:endPosition =

interpretation = BASELINE

sequenceNumber = 2

featureLifetime

gml:TimePeriod

gml:beginPosition = 2009-01-01T00:00:00Z

gml:endPosition =

designator = 09L/27R

type = RWY

nominalLength = 2800.0 M

lengthAccuracy = 1 M

nominalWidth = 45.0 M

widthAccuracy = 1 M

lengthStrip = 2920.0 M

widthStrip = 300.0 M

surfaceProperties

SurfaceCharacteristics

composition = CONC

surfaceCondition = EXCELLENT

classPCN = 80

pavementTypePCN = RIGID

pavementSubgradePCN = B

maxTyrePressurePCN = W

evaluationMethodPCN = TECH

message:hasMember

Taxiway

gml:identifier = 78396f68-9c03-438a-a6b4-331157b1a79c

timeSlice

TaxiwayTimeSlice

gml:validTime

gml:TimePeriod

gml:beginPosition = 2017-07-01T00:00:00Z

gml:endPosition =

interpretation = BASELINE

sequenceNumber = 2

featureLifetime

gml:TimePeriod

gml:beginPosition = 2013-04-23T12:00:00Z

gml:endPosition =

designator = B

width = 23.0 M

surfaceProperties

SurfaceCharacteristics

composition = CONC

surfaceCondition = FAILED

classPCN = 80

pavementTypePCN = RIGID

pavementSubgradePCN = B

maxTyrePressurePCN = W

evaluationMethodPCN = TECH

...

message:AIXMBasicMessage

message:hasMember

Runway

gml:identifier = 9e51668f-bf8a-4f5b-ba6e-27087972b9b8

timeSlice

RunwayTimeSlice

gml:validTime

gml:TimePeriod

gml:beginPosition = 2017-07-01T00:00:00Z

gml:endPosition =

interpretation = BASELINE

sequenceNumber = 2

featureLifetime

gml:TimePeriod

gml:beginPosition = 2009-01-01T00:00:00Z

gml:endPosition =

designator = 09L/27R

type = RWY

nominalLength = 2800.0 M

lengthAccuracy = 1 M

nominalWidth = 45.0 M

widthAccuracy = 1 M

lengthStrip = 2920.0 M

widthStrip = 300.0 M

surfaceProperties

SurfaceCharacteristics

composition = CONC

surfaceCondition = OTHER:EXCELLENT

classPCN = 80

pavementTypePCN = RIGID

pavementSubgradePCN = B

maxTyrePressurePCN = W

evaluationMethodPCN = TECH

message:hasMember

Taxiway

gml:identifier = 78396f68-9c03-438a-a6b4-331157b1a79c

timeSlice

TaxiwayTimeSlice

gml:validTime

gml:TimePeriod

gml:beginPosition = 2017-07-01T00:00:00Z

gml:endPosition =

interpretation = BASELINE

sequenceNumber = 2

featureLifetime

gml:TimePeriod

gml:beginPosition = 2013-04-23T12:00:00Z

gml:endPosition =

designator = B

width = 23.0 M

surfaceProperties

SurfaceCharacteristics

composition = CONC

surfaceCondition = OTHER:FAILED

classPCN = 80

pavementTypePCN = RIGID

pavementSubgradePCN = B

maxTyrePressurePCN = W

evaluationMethodPCN = TECH

...

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