A field map keeps more than position.
It keeps the hesitation of a line, the weight of a slope, the doubt beside a contact.
Memory
A map can hold:
- the trace of an observation;
- the edge of a hypothesis;
- a change of scale;
- a relation that was hard to see on site.
GIS makes that memory movable.
Line
The map is strongest when it stays close to the ground it came from.