Visual variable Size Value Requirement Shape Motion Colour Texture Position Orientation Representation of the terrain of the stands No No Yes Yes Limited Limited Limited Limited* Representation of the boundaries Yes, but changes of a stand are rather in LoD No Yes Yes Yes than shape Limited Limited* Limited* Representation of spatial patterns Yes, but changes among stands are rather in LoD Yes Yes Yes Yes than shape Limited Limited* Limited* Representation of spatial Yes, but changes relationships between stands and is rather in LoD Yes Yes Yes Yes other physical objects than shape Limited Limited* Limited* Representing the impact of new Yes, but changes infrastructure are rather in LoD Yes Yes Yes Yes than shape Limited Limited* Limited* Display of additional information No No Yes Yes Yes Yes Limited Limited* * Limited, only appropriate for the camera. Table 3. Relevance of visual variables for the requirements of informal settlement upgrades (selective) Informal settlement upgrade planning requires accurate models, i.e. existing objects should be shown in their correct positions. This does not necessarily mean that the model shall be georeferenced, but that all objects representing existing features (e.g. shelters) and planned developments (e.g. tar roads or water distribution points) should be placed in their correct relative position. Thus position is not applicable as a visual variable for the requirements relating to objects, as changing the X, Y or Z positional parameter of the object will alter the accuracy of the model. However, the position of labels displaying additional information can be altered as needed to ensure that the information is optimally placed and legible.
Visual variable Requirement Position Size Shape Value Colour Orientation Texture Motion Representation of the terrain of the stands No Limited No Limited Yes Limited* Yes Limited Representation of the boundaries of a stand Limited* No Yes, but changes are rather in LoD than shape Limited Yes Limited* Yes Yes Representation of spatial patterns among stands Limited* Yes Yes, but changes are rather in LoD than shape Limited Yes Limited* Yes Yes Representation of spatial relationships between stands and other physical objects Limited* Yes Yes, but changes is rather in LoD than shape Limited Yes Limited* Yes Yes Representing the impact of new infrastructure Limited* Yes Yes, but changes are rather in LoD than shape Limited Yes Limited* Yes Yes Display of additional information Yes Yes No Limited Yes Limited* No Yes * Limited, only appropriate for the camera. Table 3. Relevance of visual variables for the requirements of informal settlement upgrades (selective) Informal settlement upgrade planning requires accurate models, i.e. existing objects should be shown in their correct positions. This does not necessarily mean that the model shall be georeferenced, but that all objects representing existing features (e.g. shelters) and planned developments (e.g. tar roads or water distribution points) should be placed in their correct relative position. Thus position is not applicable as a visual variable for the requirements relating to objects, as changing the X, Y or Z positional parameter of the object will alter the accuracy of the model. However, the position of labels displaying additional information can be altered as needed to ensure that the information is optimally placed and legible.
T31-243_1426657769.docx