Tag Archives: GIS

Free high-resolution satellite imagery and how to find it.

Where can you find free high resolution satellite imagery for your project, which is the best imagery and what are the issues with it? Continue reading

Posted in Remote sensing | Tagged , , , , , , , | 2 Comments

Finishing the map, georeferencing the pyramid of Djedefre

Georeferencing a map of the pyramid complex of Djedefre, wrestling with inaccuracies, residuals and RMSE. Continue reading

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Errors, inaccuracies, resolution and RMSE: Georeferencing a difficult map of Abu Rawash’s pyramid and cemeteries

What makes georeferencing historic maps difficult and how does the process work? Here I georeference a problematic map of Abu Rawash, pyramid and cemeteries, Egypt. Continue reading

Posted in Archaeology and Egyptology, GIS | Tagged , , , , , | 1 Comment

Wonky Giza pyramids: Oblique satellite imagery and georeferencing

Satellite imagery is very precise but can still exhibit parallax. This is a particular issue for georeferencing historic maps, demonstrated here with reference to the Giza Pyramids. Continue reading

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Shifting mastabas: Georeferencing a plan of a Fourth Dynasty Egyptian mastaba cemetery, at Abu Rawash.

How do archaeologists relate historic maps and plans to modern satellite imagery and maps? This post and video shows how a historic map of mastaba cemetery F at Abu Rawash, Egypt was georeferenced with ArcGIS. Continue reading

Posted in Archaeology and Egyptology, GIS | Tagged , , , , , , | 3 Comments

Kinky Temples: Satellite imagery ‘fails’!

What happens when satellite imagery contains errors? Warping of the satellite imagery has left us with kinky temples at Deir el-Bahri. Continue reading

Posted in Archaeology and Egyptology, Remote sensing | Tagged , , , , | 1 Comment

Ditch that total station and grab your tablet? ArcGIS Collector and QGIS QField mobile-GIS survey apps reviewed.

How do the latest mobile-GIS apps measure up in the field? I review two new approaches to archaeological survey. Continue reading

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