- Why are there so many questions just to request a consultation?
A lot goes into making a map. Before we can even consider what data/information should be shown, we have to know who will use it, how they will use it, and how it will help solve a problem (for you or for them).
Then we can decide the priority of information to show on the map so we don’t overwhelm the map reader with too much information.
- Where does the map data come from?
I use open source data such as OpenStreetMap data, which is crowd-sourced, or government OpenData where it is available. Both sources must be cited on the map to abide by copyright laws.
Another source for larger areas (at the world or country-level) is Natural Earth, which was built by many volunteers as a public domain data source.
- Is the data accurate?
It depends on the quality of data collection. If the map data is of an area with a lot of OpenStreetMap contributors or it has been extensively surveyed with accurate equipment or high-resolution imagery, it will be more accurate.
For any data source, if you know the area well you may notice some minor errors. Please let me know and I will pass on your notes to the owner of the dataset. If you are interested in helping collect and update open source data for your area, please consider contributing to OpenStreetMap.