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Code Issues 157 Wiki Activity

Georeference a new map against a point in Poland

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"New map" now asks what is being started. A fictional scenery keeps its own
frame, where coordinates mean nothing outside it. A real one pins the
scenery's zero to a point picked off a map of Poland, so the plan is drawn
in EPSG:2180 - the frame the layout library already works in, and the one
Geoportal serves imagery in.

The projection is the standard transverse Mercator series for PUWG 1992 on
GRS80. Checked against known values: the central meridian comes out at
easting 500000 exactly, Warszawa at 637382/486757, Krakow at 567614/244588,
Gdansk at 477038/720937.

The map behind the picker is a schematic border outline plus the larger
cities, projected from geographic coordinates on first use. It is coarse on
purpose - it is there to point at a region, not to measure against - and the
dialog says so. No network is involved.
This commit is contained in:
maj00r
2026-07-31 19:32:00 +02:00
committed by maj00r
parent 3fbc1aaaaf
commit bf82c35734
8 changed files with 454 additions and 6 deletions
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12
application/planpanel.h
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@@ -32,6 +32,11 @@ class plan_panel : public ui_panel
void render_toolbar();
void render_gaps();
void render_storage();
// asks what kind of scenery is being started, and where on the map it sits
void render_newmap_dialog();
void render_location_dialog();
// clears the drawing and sets the point of EPSG:2180 that the scenery's zero stands for
void start_map(bool const Georeferenced, double const Originx, double const Originy);
// paints the solved plan over the rendered scenery and takes the clicks that build it
void handle_scene();
void draw_on_scene();
@@ -64,4 +69,11 @@ class plan_panel : public ui_panel
double m_pendingy{0.0};
std::string m_status;
char m_path[256]{"editor/plan.m0s"};
// location picker: the point being considered, and the view over the schematic map of Poland
bool m_pickingplace{false};
double m_pickx{0.0};
double m_picky{0.0};
double m_mapviewx{0.0};
double m_mapviewy{0.0};
double m_mapscale{0.0};
};