General information

Digital orthophoto is very popular and frequently applied among GIS users. It became popular as the basic information layer while using modern GIS technologies. Digital orthophoto is a perspective choice for full GIS development as the price for computer disc memory is reducing and computer turn arounds becoming faster.

Data

Lithuanian digital Orthophotographic Map ORT10LT at scale 1:10000 is created during the years of 2005-2006 on the base of Aerial photography and covers the whole teritory of Lithuania. During the process of orthophotographic map production, information of aerial photography is geometrically corrected by minimizing deformation errors of location down to possible minimum. ORT10LT raster data resolution is 0.5 m on ground.

Mathematical Background

Mathematical background of ORT10LT comes along with the statements of the resolution No 936 published by the Government of the Republic of Lithuania on the 30th of September 1994:

• Co-ordinate system LKS-94;
• Map sheet division scheme and numbers in LKS-94 system (2774 map sheets).
  

Application range

Digital orthophoto is very popular and frequently applied among GIS users. It became popular as the basic information layer while using modern GIS technologies.

Digital orthophoto can be used for technically specific tasks:

• planimetric and cadastre mapping;
• municipality data registration and quality control;
• for precise project analysis and implementation.

Digital orthophoto also can be used for presenting projects and solving disputes in public, because images of real ground surface are easier understood and percepted for untrained glance. There you can see landmarks and recognizable locations. World is constantly changing and digital orthophoto can help to watch and record these changes.

Assignement clauses

ORT10LT raster data is assigned in standard map sheets (2774 map sheets) in the State territory map sheet division system and numbering LKS-94.

ORT10LT raster data is assigned in TIFF data format. Data of one ORT10LT map sheet takes ~300MB. Data can be assigned in different formats upon a separate agreement. Assigning data in MrSID format SID data is compressed by 20 times.

The copyright of Digital Orthophotographic Map of Lithuania at scale 1:10000 ORT10LT to the National Land Service under the Ministry of Agriculture. Official authorized distributor of ORT10LT is the State Enterprise “GIS-Centras”. Digital Orthophotographic Map of Lithuania at scale 1:10000 ORT10LT is distributed by signing 2, 3, 4 or 5 year duration licence agreement with the State Enterprise “GIS-Centras”.