Cordalba 2017 Orthophoto Imagery at 6cm Resolution

2017-05-15 aerial imagery of Cordalba, captured with a VisionMap A3-Edge sensor at 2440m altitude. The dataset provides orthorectified RGB imagery with a 6 cm spatial resolution, corrected using a digital terrain model and tiled into 1km x 1km GeoTIFFs.

Use Cases

• Create high-resolution base maps by mosaicking 1km x 1km GeoTIFF tiles for spatial analysis.
• Analyze ground-level feature changes over time using the 6 cm resolution orthophotos from 2017.
• Assess spatial accuracy for ground-level features, noting the stated +/- 3 pixel accuracy at 68% confidence.
• Integrate orthophotos as a backdrop layer with other spatial data in Web Mercator Auxiliary Sphere projection.

Strengths

• High 6 cm spatial resolution for detailed ground-level observation.
• Orthorectified using a DTM and commercial software for geometric map-like accuracy.
• Imagery captured on a single date (2017-05-15) with a 300mm focal length sensor, ensuring consistent conditions.

Limitations

• Spatial accuracy is reduced for elevated structures like rooftops and tree canopies due to relief displacement.
• Accuracy is also reduced in areas of dense vegetation, limiting reliability for measurement in those zones.
• Dataset is a single temporal snapshot from 2017, preventing change detection without complementary data.

Provenance

Source

Bundaberg Regional Council Open Data, author brc_gis.

Collection Method

Aerial capture via VisionMap A3-Edge sensor, processed with high-end commercial and proprietary photogrammetric software.

Time Range

2017-05 -15.

Freshness

null

Geography

Cordalba, Australia.