Topographic mapping includes features that are visible on the ground (planimetric), or can be derived from photogrammetric measurements. The pole dataset is broken down into the following subtypes:
Limitation:
Data is collected via manual digitization from aerial imagery. It has a ground accuracy of +- 30cm. Poles added/deleted/moved through construction may not be reflected in the dataset immediately due to operational constraints. Due to the inability to see poles located close to tall buildings, or in areas of deep shadow; some poles may not be collected at all.