Base map CR 1:50,000 - colour seamless - 08201070

Since 2002, the ZM 50 is produced using digital technology from the Fundamental Base of Geographic Data of the Czech Republic (ZABAGED®) and the database of geographic names of the Czech Republic Geonames. The data are derived directly from Data50 cartographic database of IS SMD technology line. These files are by the application server service rasterized with resolution of 800 dpi, 24 bit colours and unified raster palette. The distribution is in TIFF format (LZW compression). The export units are 10x10 km segments with edges parallel to S-JTSK datum axes. Segments are georeferenced in the coordinate system using text files (TFW) for S-JTSK Krovak EN and WGS 84 / UTM zone 33N projections.自2002年起，ZM 50数据集采用捷克共和国地理数据基础库（Fundamental Base of Geographic Data of the Czech Republic，ZABAGED®）与捷克共和国地理名称数据库（Geonames）的数字技术进行生产。数据直接源自IS SMD技术线路下的Data50制图数据库。上述文件通过应用服务器服务完成栅格化处理，分辨率为800dpi，采用24位色彩模式并使用统一栅格调色板。数据以TIFF格式分发，并采用LZW压缩算法。导出单元为边长与S-JTSK基准轴平行的10×10公里区块。上述区块通过文本文件（TFW）实现地理配准，支持S-JTSK Krovak EN与WGS 84 / UTM zone 33N两种投影坐标系。