Land Administration Standardization with focus on Evidence from the Field and Processing of Field Observations1

This paper will focus on (cadastral) geodata acquisition, based on field surveys in the context of the ISO 19152 Draft International Standard (DIS) Land Administration Domain Model (LADM). During the development of LADM existing standards have been re-used as far as possible. Original observations related to adjudication, and all geodata maintenance, because of land transactions, physical planning, establishment of mortgage, etc. need to be documented. This is for quality, consistency and integrity reasons. The documentation is the basis for authenticity of the administrative and geodata. In case of cadastral geodata this documentation is often referred to as "evidence from the field".Data acquisition can be based on variety of approaches (low cost / high tech), which not always involves conventional terrestrial surveying. Observations may require transformations and adjustments, or other corrections (e.g. rectangulation), before the cadastral geodata for spatial units can be edited. Those transformations and adjustments can be documented again. All different types of the geodata acquisition can be represented in LADM. However, procedures for data acquisition itself are not included in the standard