ATKIS Model Generalization and On-Demand Map Production

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Regina Harrington
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1 ATKIS Model Generalization and On-Demand Map Production Liqiu Meng Technische Universität München

2 Background Multiple Presentation / Multiple Representation Strategy of ATKIS Model Generalization Operations of On-demand Cartographic Visualization

3 Cartographic Generalization Model Generalization Map Design

4 Multiple Presentation of Topography Graphics -> > Graphics Generalized Map 1 Basis-DLM Generalized Map 2 Base map Generalized Map 3... Generalized Map n

5 Multiple Representation of Topography Model Generalization (parallel) Basis-DLM Visualization DTK10/25 DLM50 Visualization DTK50 DLM250 Visualization DTK250 DLM1000 Visualization DTK1000

6 Multiple Representation of Topography Model Generalization (sequential) Basis-DLM Visualization DTK10/25 DLM50 Visualization DTK50 DLM250 Visualization DTK250 DLM1000 Visualization DTK1000

7 DLM OK50 (2) (1) DLM Basis-OK Value-adding Basis-DLM Model comparison, Definition of global constraints Identification of Generalization operations, Derivation of secondary attributes (3) Definition of local constraints, Pattern recognition, Construction of rules SK50 Cartographic Visualization of DLM50 Model Generalization (4) (5) Quality assurance Object-based identification of algorithms Generalization toolkit with metadata

constraints, Pattern recognition, Construction of rules SK50 Cartographic Visualization of DLM50 Model

8 ID-Relationships between Basis OK and OK50 1:0 Elimination 1:1 without dimensional shift 1:1 from area to line 1:1 from area to point n:1 without creation of new object ID n:1 with creation of new object ID Division of Attributes Dominant Geometric / Semantic Qualitative / Quantitative Constraints Separating Reducing Reserving

creation of new object ID n:1 with creation of new object ID Division of

9 Steering Rules Operation 1 Operation 2 Operation l... Algorithm 1 Algorithm 2 Algorithm m... Constraint 1 Constraint 2 Constraint n...

10 Operations of Model Generalization Selection / Elimination Dimensional Shift Classification / Typification Line Simplification Area Amalgamation Aggregation Association

11 Hole after elimination Skeleton (Bader & Weibel, 1997) Area allocation Before and after elimination Filling based on mode principle (Schylberg, 1993)

12 Classification Typification

13 Line Simplification Original geometry Self intersection Simplified line Original geometry Topological conflict with neighboring obj. Simplified line

14 Amalgamation of Area Objects

15 Aggregation Settlement Vegetation Water Township or village Objects of the same class Objects of different classes Objects of the same geometry type Objects of different geometry types

16 Hierarchical aggregation n:1 Functional aggregation n:m with n>m

17 Association n:m with n>m Molenaar, 1998

18 Execution Sequences of Generation Operations Original Data Amalgamation Selection /Elimination Original data Classification Amalgamation ation /Typification

19 Derivation of Quantitative Measures arithmetic, statistic, fuzzy Definition of Local Constraints and Rules calling sequence, parameters, iteration degree, control points, identity from multi-identity, identity, rules -> > algorithms, rules -> > conditions + actions Enrichment of Algorithms applicability, side effects, valid range of a parameter, computer intensity, converging speed, equivalent method, missing method, integration in data

-> > algorithms, rules -> > conditions + actions Enrichment of Algorithms applicability, side effects, valid

20 L1 L2 F1 L3 Rule based treatment of the object L2 with double identity Partitioning an object into homogeneous parts based on fractal analysis

$homogeneous parts based on fractal$

21 Strategies for Quality Control The best possible solution through enrichment of tools and data An acceptable solution without enrichment of tools and data An acceptable solution through enrichment of tools and data

22 Operations of Map Design Visible / Hidden Symbolization / Typification Smoothing Exaggeration Displacement Text placement Layout design

23 Map as Interface between System User and Model DLM On-demand Visualization DTK Geometry Appearance Topographic Objects

AdV Project: Map Production of DTK50 and DTK100 by Using Generalisation Processes

Geoinformation und Landentwicklung AdV Project: Map Production of DTK50 and DTK100 by Using Generalisation Processes Sabine Urbanke, LGL Baden-Württemberg AdV- Project: The AAA Data Model Geodetic reference