Base map CR 1:50,000 - colour seamless - 05801120

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数据集便基于捷克共和国基础地理数据基础（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。其数据直接取自IS SMD技术线路下的Data50制图数据库。该数据集文件通过应用服务器服务完成栅格化处理，分辨率为800每英寸点数（dots per inch，简称dpi），采用24位色彩深度并使用统一的栅格调色板。数据集的分发格式为标记图像文件格式（Tagged Image File Format，简称TIFF），采用LZW压缩算法。导出单元为10×10千米的图幅，图幅边缘与S-JTSK基准轴平行。所有图幅均通过文本文件（TFW）完成地理配准，适配S-JTSK Krovak EN与WGS 84 / UTM 第33N带两种投影坐标系。