As the amount of detailed altitude data grows, so does the importance of generalization. When a coarser analytical scale is required, the original finer-resolution digital elevation model (DEM) needs to be generalized or simplified to reduce data redundancy (Zhou & Chen, 2011). The issue of scale and resolution is very important
Publishing geodata in the form of vector tiles and comparing performance with raster tiles In recent years, the publishing of geodata on the Internet has been a clear move towards using vector tiles. The difficulty of tasks for rendering vector data, where cartographic representation is provided from the side of the client, is greater than in raster data. Much attention is paid to the preparation of vector tiles and their optimization. Little interest is given to the negative effect of using vector tiles, such as higher load and time to render content on the web client. In this article we deal with vector tile issues and their use in web cartography for transfer data from server to client. Our main goal was to create a test application that quantitatively evaluates the use of vector tiles compared to traditional raster tiles. We briefly introduce vector tiles, available standards and formats and the technology used to work with them. The last part of this article deals with the detailed description of data preparation and the creation of the test application itself and describes the achieved results from the measurements carried out.
The contribution deals with the evaluation of the quality of geographic information in accordance with the ISO standards from the family of ISO 19100. The quality assessment was carried out on a sample of the data of the digital elevation model of the Slovak republic - DMR3. The selected data quality elements and sub-elements were evaluated using measures defined in the INSPIRE data specification for Elevation.
Interpretation of data visualized in maps strongly depends on the experience of map reader and on the way the data are presented. Styling the data is crucial especially when creating maps for users with weaker cartographic knowledge and map reading experience. Because web mapping applications make spatial data more accessible to general public, this issue requires special attention in terms of their design. Here we present a styling approach for designing a web mapping application that assembles huge amount of data related to the issue of environmental health, based on our own experience with creating a web mapping application available at https://uvp.geonika.sk/map/ (Department of Cartography… 2016). As the field of environmental health is multidisciplinary, it requires combination of data from various sources and of various types, topics and resolutions. Various data were compiled, requiring thoughtful approach to styling with regard to the users of the mapping application, who are supposed to be not only professionals (from the field of geography and geoinformatics as well as of medicine, epidemiology, environmental sciences etc.), but also general public. Many of such users do not possess adequate cartographic knowledge, which is the reason why the data styling had to reflect this limitation.
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