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ANALYSIS OF THE QUALITY OF COLLECTION 4 AND 5 VEGETATION INDEX TIME SERIES FROM MODIS
Data Quality Time Series Data Collections Vegetation Index MODIS Germany
2015/9/28
Globally acquired data from both MODIS instruments are suitable for science quality time series, because the unique concept of pixel-level quality information of each MODIS land product allows a detai...
APPLICATION OF GML-BASED GEO-METADATA FOR DATA QUALITY INFORMATION MANAGEMENT AND DISSEMINATION ON THE WEB
Data Quality In-situ sensor Interoperability GML Metadata
2015/9/28
Nowadays developing geo-metadata with the capacity for data quality management and dissemination plays an important role in GIS/Geomatics world. Data quality information embedded in geo-metadata helps...
PREVENTION OF SPATIAL DATA COMPRESSION QUALITY DEGRADATION
Compression indexing Huffman blocking mobile
2015/9/28
Data indexing and compression procedures have enabled several significant advances in the application of spatial data. Data coverage, portability, transfer, multi-scale representation (pyramids), quer...
QUALITY-AWARE AND METADATA-BASED INTEROPERABILITY FOR ENVIRONMENTAL HEALTH INFORMATION
Metadata Data Fusion Data Quality Impedance Mismatch Early Requirements
2015/9/28
This paper addresses impedance mismatch problems, which occur when two information systems are plugged for workingtogether. Such problems are particularly crucial for environmental health, where busin...
QUALITY ASSESSMENT FOR POLYGON GENERALIZATION
generalization polygon data quality assessment
2015/9/28
Different methods for map generalization have been developed. However, there are only a few publications that discuss the automatic quality assessment of generalized maps. This problem becomes crucial...
Quality Assessment in Spatial Clustering of Data Mining
Spatial Data Mining Quality Assessment Clustering Compactness Separation
2015/9/28
Because of the use of computers and its advances in scientific data handling and advancement of various geo and space borne sensors, we are now faced with a large amount of data. Therefore, the develo...
MODELING DATA QUALITY WITH POSSIBILITY-DISTRIBUTIONS
GIS Data Quality Metadata Modelling Fuzzy Logic Possibility Theory Interoperability
2015/9/28
Description of data quality relies heavily on numbers. When dealing with data sets, which have been collected during longer periods, however, variation in the data quality will become evident. Older d...
A CONCEPTUAL FRAMEWORK FOR QUALITY ASSES SMENT OF SEMANTIC MAPPING BETWEEN SPATIAL ONTOLOGIES
Data Quality Ontology Mapping Semantic Integration Semantic Similarity Model Mapping Conflict Predicates
2015/9/28
Quality of integrated data depends on the quality of original data sources, but it can also be affected by the semantic mapping process between ontologies of different sources, thus influencing the qu...
STORING AND QUERYING SPATIALLY VARYING DATA QUALITY INFORMATION USING AN INTEGRATED SPATIAL RDBMS
quality spatial variation metadata sub-feature variation spatial database
2015/9/28
Current representations of spatial data quality (SDQ) do not adequately represent the spatial variation of SDQ. For example, a user who wants to know the positional accuracy of a feature usually has t...
BEYOND METADATA: TOWARDS USER-CENTRIC DESCRIPTION OF DATA QUALITY
Metadata Data Quality Standards Autocorrelation Collection-Level Metadata
2015/9/28
Data quality statements are now entrenched in metadata standards worldwide. I contrast the needs of the user with the production-control mechanisms of the producer, and argue that metadata standards a...
ASSESSING THE QUALITY OF DATA WITH A DECISION MODEL
ASSESSING THE QUALITY OF DATA DECISION MODEL
2015/9/28
The quality of GIS data cannot be assessed independently of what it should be used for (“fitness for use”); this assessment requires currently human expert interaction. If the user describes how he us...
A QUALITY ASSESSMENT METHOD FOR 3D ROAD POLYGON OBJECTS
Quality Assessment Quality Element 3D Road Polygon LiDAR
2015/9/21
With the development of the economy, the fast and accurate extraction of the city road is significant for GIS data collection and update, remote sensing images interpretation, mapping and spatial data...
SPATIAL DATA QUALITY AND A WORKFLOW TOOL
Spatial Data Quality Communication Producer Consumer Fitness for Use Open Data LPIS ETS
2015/9/21
Although by many perceived as important, spatial data quality has hardly ever been taken centre stage unless something went wrong due to bad quality. However, we think this is going to change soon. We...
CARTOGRAPHIC REPRESENTATION OF SPATIAL DATA QUALITY IN VGI FOR USERS WITH DIFFERENT SEMANTICS
Spatial Data Quality Users’ Semantics VGI Positional Accuracy Completeness
2015/9/21
Volunteered geographic information is constantly being added, edited or removed by users. Most of VGI users are not experts, thus formal representation of spatial data quality parameters through metad...
GENERALISATION AND DATA QUALITY
Data Quality Quality Criteria Automatic Generalisation Validation Fitness for Purpose
2015/9/21
The quality of spatial data has a massive impact on its usability. It is therefore critical to both the producer of the data and its users. In this paper we discuss the close links between data qualit...