Large scale road network generalization for vario-scale map

The classical approach for road network generalization consists of producing multiple maps, for a different scale or purpose, from a single detailed data source and quite often roads are represented by line objects. Our target is the generalization of a road network for the whole scale range from large scale, where roads are represented as area...

2D vario-scale representations based on real 3D structure

This paper focuses on 3D data structures supporting an alternative approach for creating 2D vario-scale maps. The smooth animated zooming functionality have lead us to investigate a volumetric representation of gradually changing vario-scale objects. In this paper, the principle of vario-scale maps with theoretical knowledge about 3D...

SplitArea: Een algoritme om vlakken te splitsen voor de tGAP datastructuren

Hoewel variabele schaal datastructuren een mogelijke oplossing zijn om geografische gegevens op meerdere schalen consistent bij te houden en te ontsluiten (bijvoorbeeld via webservices), staat of valt een dergelijke oplossing met een goed uitgevoerd generalisatieproces. Om op kleinere kaartschalen te kunnen beschikken over lijnrepresentaties van...

Vario-scale data structures supporting smooth zoom and progressive transfer of 2D and 3D data

Variable-schaal geo-informatie [1]

Digitale kaarten worden tegenwoordig overal gebruikt van desktop tot mobiele telefoon en het gebruik is meer en meer interactief en gebaseerd op zoomen en pannen. Kaartgeneralisatie onderzoek kijkt naar generalisatie zonder vaste schalen (‘continue generaliseren’). Hoewel er een aantal eerste resultaten zijn (van Kreveld, 2001; Sester and...

Method and system for generating maps in an N-dimensional space

A method for generating a vario-scale visual representation of n-dimensional objects (together forming a space partition) is presented comprising the steps of - generating a higher and a lower detailed n-dimensional object representation each comprising digital data representing objects by zones in said n-dimensional object representations, said...

Vario-scale data structures for 2D and 3D geo-information

Comparing the vario-scale approach with a discrete multi-representation based approach for automated generalisation of topographic data

5D Modelling - applications and advantages

As explained in van Oosterom & Stoter (2012), the nD modeling approach allows us to include different aspects of geo-information in spatial modeling at a fundamental level, i.e. by treating these aspects as additional (geometric) dimensions. This paper explains how nD data models and data structures may solve the issues of redundancy and...

True vario-scale maps that support smooth-zoom

This paper presents the first true vario-scale structure for geographic information: a delta in scale leads to a delta in the map (and smaller scale deltas lead to smaller map deltas until and including the infinitesimal small delta) for all scales. The structure is called smooth tGAP and its integrated 2D space and scale representation is...

The space-scale cube: An integrated model for 2D polygonal areas and scale

This paper introduces the concept of a space-scale partition, which we term the space-scale cube – analogous with the space-time cube (first introduced by Hägerstrand, 1970). We take the view of ‘map generalization is extrusion of 2D data into the third dimension’ (as introduced by Vermeij et al., 2003). An axiomatic approach formalizes the...

The space-scale cube: An integrated model for 2D polygonal areas and scale

This paper introduces the concept of a space-scale partition, which we term the space-scale cube – analogous with the space-time cube (first introduced by Hägerstrand, 1970). We take the view of '"map generalization is extrusion of 2D data into the third dimension" (as introduced by Vermeij et al., 2003). An axiomatic approach formalizes the...

Towards a true vario-scale structure supporting smooth-zoom

This paper presents the first true vario-scale structure for geographic information: a delta in scale leads to a delta in the map (and smaller scale deltas lead to smaller map deltas until and including the infinitesimal small delta) for all scales. The structure is called smooth tGAP and its integrated 2d space and scale representation is...

Applying DLM and DCM concepts in a multi-scale data environment

A storage and transfer efficient data structure for variable scale vector data

This paper deals with efficient data management of variable scale vector data. Instead of pre-building a collection of data sets on different scales, we create an index structure on the base data set (largest scale data) that enables us to extract a map at exactly the right scale the moment we need it. We present both the classic version of the...

Progressive transmission of variable scale vector data over the web - more details on demand

Research challenges in automated generalisation and cartographic modelling