Source photographs

The model’s surface is blended from many photographs, so up close the photographs themselves are the sharpest evidence there is. The Source photographs strip finds the photographs that show a point on the structure and ranks them by how much detail they hold there.

The strip

Item	What it does
Source photographs	The strip’s title. The note beside it says how many photographs were found
Pick point	Arms point picking: each click on the model finds the photographs of that point. It stays armed, so you can click several places in turn
⌄	Collapses the strip
Photograph cards	One card per photograph, best first, with a dot on the point you picked

Each card’s caption reads, for example, “0.8 mm/px · 12° · 9.4 m”:

Figure	Meaning
mm/px	How much concrete one pixel of the photograph covers at the point. Smaller is sharper
°	How far the camera looked away from square-on to the surface
m	How far the camera was from the point

If no photograph shows the point, the strip says so — the point may be inside the structure, or in a part the capture flight did not cover.

The photograph pane

Click a card to open the photograph in a pane over the view. The toolbar stays available.

Control	What it does
Name and details	The file name, when it was taken, the detail at the point (mm/px), the angle, the distance and the image size
Point	Arms the point tool on the photograph: click a place to record a finding there, or drag a rectangle to record one against a measured patch
Outline	Arms the outline tool on the photograph: click each corner of an outline. Click the first point again, or press Enter, to close it
Fit	Fits the whole photograph in the pane
Sync 3D view	Flies the 3D view to the place the photograph was taken from, framed as the pane is, and closes the pane
‹ ›	The previous and next photograph. ← and → do the same
✕	Closes the pane. Esc does the same

Turn the mouse wheel to zoom about the pointer. Drag to pan — except while Point is lit, when a left-button drag draws a rectangle; a right-button or middle-button drag always pans. Two thin lines cross at the picked point so that you can find it at any zoom; if the point is off the pane, a marker at the edge points to it — click the marker to return.