Hi Hannes,
Strictly and to some extent, I guess they are correct if we build our own GIS tool without any straightforward ready-to-use component and any GIS technology, you didn’t miss anything, in that case, we need to learn most of the things mentioned at en.wikipedia.org/wiki/Geogra...ion_system and implement them with coding based on the detailed requirements. But with the help of a straightforward and ready-to-use GIS component, all these will be simplified a lot, we just need to develop GIS software as normal application, it will make things easy, because it wrapped these complicated calculation, transformation and technical term etc. into simple APIs, we just need to follow the documentation, full-featured installation samples and ready-to-use online guide/samples to implement it.
For Map Suite, it provides various easy-to-use GIS products to fit your requirements with different .NET technologies, also we can provide the efficient technical support on the Forum , anything urgent you would like to have a quick answer, a ticket can be handled from your CRM, or asking a professional service for complicated problem or new features form support@thinkgeo.com or sales@thinkgeo.com .
Also can you let us know your requirements, so that we can details something here.
Hope it helps.
Best Regards,
Johnny