Digital Orthophoto DOP5000 Series
Orthophoto is derived from aerial photographs in which image displacement caused by relief and camera tilts has been rectified. Orthophoto maintains the pictorial information of the original aerial photographs and has uniform scale. Users can use it for analysis, planning and presentation purposes. Digital Orthophoto DOP5000 series is produced from the aerial photographs taken at various flying heights. Distortions of photographic images caused by tilting of aerial camera and relief are rectified except those of the building structures. True ortho-rectification has also been applied to elevated roads and bridges. DOP5000 series consists of 192 tiles covering all the land area of Hong Kong Special Administrative Region. It is provided in GeoTiff format on tile basis including a world file with geo-referencing data in Hong Kong 1980 Grid. The data file size of each tile is about 810MB. The ground pixel size is 0.2m x 0.2m while the accuracy is equivalent to 1:5000 scale map. The image content of DOP5000 series will be updated annually. The 192 tiles of Digital Orthophotos are available for sale to the public. Click here for data charge.
Portion of Digital Orthophoto