If you want to use it, you have to ensure that you have the legal right to do so and that you do not infringe any trademark rights. This file contains additional information, such as Exif metadata, probably added from the digital camera or scanner used to create or digitize it.If the file has been modified from its original state, some details may not fully reflect the modified file.The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. However, DTP maps are limited in order to keep the state of the art in digital cartography.This image only consists of simple geometric shapes or text. It does not meet the threshold of originality needed for copyright protection, and is therefore in the public domain.Although it is free of copyright restrictions, this image may still be subject to other restrictions.This work includes material that may be protected as a trademark in some jurisdictions.The main weaknesses are: Many map publishers have produced thousands of DTP maps from the start of the cycle of digital cartography. developed in collaboration with Huber Cartography, Munich, Germany a workflow with its cartographic software OCAD 10, to save investments in DTP maps by migrating them into its cartographic software or even into a GIS: First, the DTP map must be imported through a PDF file. Then the distortion will be dissolved and the map georeferenced.In a next step, the imported map layer will be converted into a set of symbol, which has been created by the cartographic software.The conversation has the effect that redundant will be removed.Now, all map objects can be connected to a data base, which can by edited on the fly.With this workflow the DTP map has been structured in a way that it fits into a GIS environment or could be enhanced with other geodata and maintained with specific cartographic drawing and editing tools in its migrated cartographic software as well. Enter your email address to subscribe to this blog and receive notifications of new posts by email. We guarantee that we will not spam you. Source.