Building attributes and data sources
You can access the building data via available datasources. Per city, two datasources are available that contain different data. For the building data, there are two main “datasources”:
- [city]Building provides all data of the city. Each object also contains a date. Each building or object record appears as many times as different satellite images were processed from different dates. For example, the abujaBuilding datasource provides each building object on two different dates. Some objects that were detected as type “land” in 2010 might now be of type “bungalow”.
- [city]geoBuilding provides only the objects that have changed over time in their type and are not the same any more. This datasource is therefore a subset of the [city]Building datasource. It only contains records that have changed over time. This datasource is mainly used in mapping change on maps.
The following table provides an overview of the attributes that are available in both datasources for each detected object / building. More attributes such as estimated building size can be made available as part of the Custom plan.
|Attribute name||Type / Values||Description|
|house_id||INT||The house id is a unique id per object detected.|
|long||POINT||Longitude of the object detected|
|lat||POINT||Latitude of the object detected|
|date||DATE||The date of the satellite image the object was found on|
|100mDensityTotal||INT||Number of buildings within the perimeter of 1000m with the long / lat of the object in the center.|
|100mDensityTypeBungalow||INT||Number of detected bungalows within the perimeter of 100m with the long / lat of the object in the center.|
|100mDensityBlueBuildings||INT||Number of detected buildings with a blue roof within the perimeter of 100m with the long / lat of the object in the center.|
(“bungalow”, “zinc”, “pool”, “land”, “unknown”)
|Detected building type by the classifier. See Building type and color definition for details. Note that land is also a type, so not al detected objects are buildings (filter type “land” is necessary”|
(“redbrown”, “gray”, “blue”, “unknown”)
|Detected building roof color by the classifier. See Building type and color definition for details.|
|quarter||String||The identified quarter based on the long / lat of the detected object|
|town||String||The identified city from based on the long / lat of the detected object|
|inputTown||String||The city and its cosmopolitan area that were processed. For example, Abuja contains Abuja city and its surroundings.|