Orthophoto Viewer Tools

Pan moves the map without creating geometry. Use it whenever the goal is navigation rather than annotation.

Measure distance draws a geodesic-aware line and reports length using the active projection and OpenLayers measurement logic.

Measure area draws a polygon and reports area, perimeter, and geometry context for site pads, clearances, and access zones.

Annotate point, line, and polygon create georeferenced findings that survive product regeneration.

Sticky note creates a lighter-weight observation when the reviewer needs context but not a full defect geometry.

Probe elevation pins DSM, DTM, and delta values so reviewers can compare surface and terrain at exact locations.

Layer controls switch between review imagery, terrain products, hillshade, ground bands, raised features, overlays, graticule, raster extent, legend, and map aids. The reviewer should treat layers as interpretation modes, not separate evidence records.

• Review mode uses the base orthophoto for general context.
• Ground Bands emphasize terrain classes and ground-level interpretation.
• Raised Features emphasize height-above-ground and prominent structures.
• Hillshade helps reviewers perceive relief and slope.
• Coordinate grid and scale aids support location communication.

The measurement tab shows the active map tool, latest distance, area, or probe result, projected coordinates, geographic coordinates, and elevation values. It is the place to confirm a result before saving it as a finding.

Orthophoto findings are georeferenced. Point, line, polygon, note, distance, area, and probe-derived observations can be selected, hidden, edited, saved, and later imported into reports.

The Orthophoto Expert tab manages product mode, product preset, overlays, units, z-offset, promoted feature labels, north arrow, coordinate grid, raster extent, legend visibility, and terrain product display. These controls shape interpretation and evidence presentation.