2

When working with 2D maps, coordinates are always expressed in X and Y. Adding a 3rd dimension also adds the Z-coordinate, which typically stands for height.

However, when working with vertical grids (for measurements, visualizations on building facades or the sides of 3D polygons, etc.) I don't know which coordinates to mention in order to express what I mean.

Is it 'X and Z' or 'Y and Z'? Or does it become 'X and Y' again since there is no 3rd dimension?

  • Are you using MapInfo or something else? – PolyGeo Jul 14 '17 at 9:51
  • Currently im using a mix of ArcScene, ArcMap and GeoMilieu (for noise calculations). I dont need the coordinates for calculations or modelling, but just for expressing things in a written report. – MoekToe Jul 14 '17 at 11:04
  • You could treat each plane (wall, roof, floor) as if it has a local X,Y coordinate system, but you would have to show the orientation for each one. However, if you use the overall coordinate system, (X,Y,Z) of the scene, a wall or a floor, unless directly parallel to two of the axes, could have all 3 components. – mkennedy Jul 14 '17 at 18:22
1

If the purpose of such analysis/presentation is to only locate/reference/measure things inside the perimeter of each plane individually, then yes, treat those as a 2D map with a Cartesian Coordinate System, hence, adopting standard X and Y terminology to designate the local coordinates.

On the other hand, use traditional X, Y and Z terminology if any georeferencing is needed or for positioning/presenting all planes together in the 3D space.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.