M.-J. Lobo, E. Pietriga, C. Appert, An Evaluation of Interactive Map Comparison Techniques, CHI '15: Proceedings of the 33rd SIGCHI conference on Human Factors in computing systems, pages 3573-3582, April 2015, Seoul, South Korea
A total of 20 reference orthoimages and 120 maps were used in the experiment.
Each image has a resolution of 2600x1500 pixels. Orthoimages and maps use the same cartographic projection (Lambert conformal conic projection) and can be superimposed perfectly.
The entire set (566MB) is available for download as a single ZIP file on demand.
The following samples illustrate each of the six types of differences between the reference orthoimagery and the map.
| (A) Extra Facility | |
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(D) Extra Road | |
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| (B) Missing Facility | |
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(E) Missing Road | |
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| (C) Modified Facility | |
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(F) Modified Road | |
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The coordinates of all differences between orthoimagery and a given map are available as a single CSV file. They are expressed in pixels in a cartesian coordinate system whose origin is at the center of the image. Differences are never located less than 100 pixels from any edge. Coordinates of differences are thus always in the following range: x in [-1200,+1200], y in [-650,+650].
| Ref. Orthoimagery | (A) Extra Facility | (B) Missing Facility | (C) Modified Facility | (D) Extra Road | (E) Missing Road | (F) Modified Road | |
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| Ref. Orthoimagery | (A) Extra Facility | (B) Missing Facility | (C) Modified Facility | (D) Extra Road | (E) Missing Road | (F) Modified Road | |
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| Ref. Orthoimagery | (A) Extra Facility | (B) Missing Facility | (C) Modified Facility | (D) Extra Road | (E) Missing Road | (F) Modified Road | |
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| Ref. Orthoimagery | (A) Extra Facility | (B) Missing Facility | (C) Modified Facility | (D) Extra Road | (E) Missing Road | (F) Modified Road | |
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| Ref. Orthoimagery | (A) Extra Facility | (B) Missing Facility | (C) Modified Facility | (D) Extra Road | (E) Missing Road | (F) Modified Road |