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Blue Sky vs. Gray Sky collections: Blue Sky collections are represented with a blue circle. Dark blue represents Urban collections at higher resolutions. Light blue represents Wide Area collections with a slightly lower resolution. Gray Sky collections are represented with a gray storm cloud.
2D collection vs. 3D collections: The 2D and 3D designations on the timeline stops indicate whether the given collection is 2D only or whether it’s a collection that includes 3D.
Collection date: The collection year is shown over the first collection in the given year. The full date for any collection can be seen by hovering over it or clicking on it to select it.
Currently visible collection: The white arrow indicates which collection is currently selected/visible on the map.
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The timeline filter allows advanced filtering of collections. This is useful for isolating collections that meet a specific set of characteristics. Click on the timeline filter to open it.
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Filter Options
Collection Type
2D: Collections that only have 2D imagery available.
3D: Collections that have both 2D and 3D imagery available.
GSD (Resolution)
5 = >2.5 cm and <6.25 cm
7.5 = >=6.25 cm and <10.75 cm
15 = >=10.75 cm and <17.5 cm
20 = >=17.5 cm and <30 cm
Ortho Status
True Ortho: Professional grade orthomosaic with little to no visible seamlines or parallax.
Ortho: High quality orthomosaic that may contain occasional artifacts or building lean.
Imagery Type
Blue Sky: Imagery collected under normal conditions as part of Vexcel's regular collection schedule.
Gray Sky: Imagery collected after a natural disaster affects an area.
Use the check boxes beside each data characteristic to filter the timeline to show only the collections you are looking for. For example, if you want to show only Blue Sky 3D collections that have a GSD (resolution) of 7.5 cm or better, uncheck the boxes that don’t match these criteria.
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