The present vegetation structure of the green volume is based on an interim result from the report "Green volume determination of the city of Dresden on the basis of laser scan data" prepared by the Leibniz Institute for ecological spatial development e.V. (IÖR) from August 2014. This can be viewed under the assigned document. Introduction: Urban greenery is indispensable from an urban ecological and social point of view and fulfills important functions such as dust binding, temperature reduction, wind dampening or groundwater recharge. In addition, public green spaces form oases of tranquility that are used for relaxation, leisure activities and communication and fulfill important social functions. The ecological effectiveness of urban greenery is particularly dependent on the existing vegetation structure. Low vegetation (lawns and meadows) has a cooling effect, especially in the evening and at night, while high vegetation (medium-sized to large trees) contributes to a reduction in climatic stress, mainly during the day, but can also have a negative effect on ventilation. Medium vegetation (shrubs, bushes, hedges and small trees), like tall vegetation, has a high level of dust-binding capacity from the air, while low vegetation mainly binds dust and gas from precipitation and, due to the high infiltration capacity, contributes a large part to groundwater recharge contributes (see also metadata on the urban climate planning information map). Background: For the determination of the green volume, it was imperative to separate vegetation from anthropogenic objects with a relevant height above the ground, such as buildings, lanterns, vehicles, etc. At the same time, further differentiation according to vegetation type was required for the application of the crown shape correction (only on deciduous trees) and the flat-rate surcharge for lawns and arable land. The following types of vegetation should be separated from each other: - deciduous tree - coniferous tree - shrubs - lawn - arable land. Data basis/methodology: The basis for determining the vegetation structure (as an interim result of the green volume determination) is laser scan data, RGBI image data and building data. Classification of the vegetation structure of the green volume: - Value 0: no vegetation => (colorless or white) - Value 1: deciduous tree => (green) - Value 2: conifer => (dark green) - Value 3: shrubs => (brown-green) - Value 4: lawns, meadows and other low vegetation => (yellow-green/light green) - Value 5: fields => (yellow-green/light green)
