Cadastral survey of land in the management of an important basic work, a sound cadastral survey results on the thorough investigation of the status quo of land use, strengthening Chanquanchanji management, urban and rural planning and management, protecting the legitimate rights and interests of land users have an important guiding role. As the cadastral survey work covers a broad ownership of the investigation are too many constraints, allowing them to carry out the work efficiency is very low. The main reason is the cadastral survey of human consumption, a long time passive measurements. It is also constrained by this factor, making many urban cadastral survey work is not carried out. Therefore, the search for a fast, economical and effective cadastral model, to carry out cadastral survey work of great significance.
1, cadastral survey
For the initial registration of land has been basically completed, and on this basis of accounting established on the city cadastre, cadastral measurements to implement a "quasi-cadastral survey" (as it is not in the strict sense of cadastral surveys, in order to facilitate this expression is defined as " quasi-cadastral survey ") is an effective exploration. The basic idea is: when the cadastral survey measured not do the work in full swing, on-site investigation only on the existing topographic map base Ji accounting in the field were plotted to boundary lines, divided into the street, our neighbors, the survey area and number, surveys were land is located, place names, house number, housing structure and layers and so on. Other content, such as right holders, land type, land use nature of the boundary line of land ownership were identified, all of the initial certification of land cadastral accounting shall prevail. "Quasi-cadastral survey" confirmed that the remaining issues such as ownership of the land left to change (or land certificates annual evaluation) is resolved one by one. Change measurement, who in accordance with the accounting measurement of cadastral maps to the scene were indeed the right to delimitation. Changes due to land (or land certificates annual evaluation) have the right to take the initiative to meet people and co-ordination to the scene that define the lines, signatures, measure have great initiative and cadastral surveys such as the right is indeed the problem is easily solved, a fundamental solution to the cadastral survey of the bottleneck problem.
2 Cadastral Survey
2.1 Cadastral Control Survey
Cadastral survey of land in the management of an important basic work, a sound cadastral survey results on the thorough investigation of the status quo of land use, strengthening Chanquanchanji management, urban and rural planning and management, protecting the legitimate rights and interests of land users have an important guiding role. As the cadastral survey work covers a broad ownership of the investigation are too many constraints, allowing them to carry out the work efficiency is very low. The main reason is the cadastral survey of human consumption, a long time passive measurements. It is also constrained by this factor, making many urban cadastral survey work is not carried out. Therefore, the search for a fast, economical and effective cadastral model, to carry out cadastral survey work of great significance.
1, cadastral survey
For the initial registration of land has been basically completed, and on this basis of accounting established on the city cadastre, cadastral measurements to implement a "quasi-cadastral survey" (as it is not in the strict sense of cadastral surveys, in order to facilitate this expression is defined as " quasi-cadastral survey ") is an effective exploration. The basic idea is: when the cadastral survey measured not do the work in full swing, on-site investigation only on the existing topographic map base Ji accounting in the field were plotted to boundary lines, divided into the street, our neighbors, the survey area and number, surveys were land is located, place names, house number, housing structure and layers and so on. Other content, such as right holders, land type, land use nature of the boundary line of land ownership were identified, all of the initial certification of land cadastral accounting shall prevail. "Quasi-cadastral survey" confirmed that the remaining issues such as ownership of the land left to change (or land certificates annual evaluation) is resolved one by one. Change measurement, who in accordance with the accounting measurement of cadastral maps to the scene were indeed the right to delimitation. Changes due to land (or land certificates annual evaluation) have the right to take the initiative to meet people and co-ordination to the scene that define the lines, signatures, measure have great initiative and cadastral surveys such as the right is indeed the problem is easily solved, a fundamental solution to the cadastral survey of the bottleneck problem.
2 Cadastral Survey
2.1 Cadastral Control Survey
"Quasi-Cadastral Survey" has a lot of work remains to be changes to the daily measurements of land progressively completed. Therefore, Cadastral Control Survey in addition to fully meet the national cadastral standardized technical indicators, but also give full consideration to change the measurement of daily needs. Change measurements, there are some cases in Boundary points might be the same as with the prospective cadastral survey, without changes to measurements, "quasi-cadastral survey" results can be applied directly; may be, there are some cases in need of measurement of the change to a number of boundary points, or all of the Boundary points, which requires the "quasi-cadastral" control points laid permanent control point density should be considered to be large, save longer to ensure that "quasi-cadastral" and in the future to change the precision of measurement of uniform. Its approach is the basic control points used in all machining good ф16 × 100mm stainless steel standard core, backbone and sub-dry plan diagram root root Traverse mechanical processed ф12 × 100mm stainless steel standard batteries, pneumatic drill with rotary core drilling to standard mosaic to the concrete floor surface. 1:500 scale topographic cadastral, urban built-up areas should be a permanent control point density of 200 per square kilometer, the control points, observation of the technical indicators are national cadastral standards prevail. In this way, change the measurements for the future provide a good prerequisite.
2.2 Cadastral Survey
Cadastral measurement of the contents of the main elements including the "quasi-cadastral survey" results, in the wild, all-digital measurement measuring administrative boundaries, ownership boundary points, boundary lines, land type and ownership sector and other related buildings, structures and such as linear features. Cadastral measurement of the three elements should follow the following principles: (1) Cadastral Boundary element point must point precision measurement facilities; (2) Field obvious features in the corresponding boundary points must be measured in polar coordinates method Boundary point coordinates; because pass depending on conditions, limitations, can not directly measure the boundary point of intersection with the distance analysis of its coordinates; (3), taking into account the daily variation of cadastral measurement likelihood, could be boundary points of buildings, structures the main features of points, road edges, etc. in order to Boundary point precision measurement facilities; (4) other terrain elements, according to digital topographic measurement requirements Shi test.
3, cadastral map compilation

Digital measurement field mapping after a good compilation of digital topographic maps based on the cadastral map editor. Cadastral map editor for the cell to case-by-case-by-film editing, the formation of ground were drawn map, street line graph, line graph neighborhood, a line drawn map of the survey area, different types of data should be in different data layers.

Cadastral elements map editing steps: (1) first in the topographic map on the basis of the "quasi-cadastral survey" results on the boundary points of each ground connection; (2) According to the boundary line drawn a good note on land type and number lot number; (3) into the street community, neighborhood community and the investigation of the district boundaries and the Note; (4) membership base accounting were to enter the property; (5) to generate and output Boundary Boundary point symbol point coordinate data; (6 ) cadastral map surface finishing.
As the "quasi-cadastral survey" results would require a subsequent gradual improvement, so the results are dynamically updated, so a list of these maps and boundary points, results can not output print binding.


4, Cadastral Information System

Based on this measurement mode, the need for a cadastral survey results dynamically updated, and gradually perfect the process. The outcome of the traditional tables and charts have been difficult to adapt. Therefore, the application GlS technology to manage cadastral information has been the general trend. We are in practice the use of MGE-based platform for geographical information to develop a set of to meet the needs of cadastral information management system, works well to achieve the desired objective.

At present, China has a digital topographic, cadastral software is almost not directly based on GIS platform. In order to topography, cadastral spatial data and attribute data with GlS software for data exchange, we must build digital topographic, cadastral GIS software and data exchange between software standards. The exchange of documents should adopt the ASCll yards file format. Elements of the exchange of cadastral documents, can be divided into cases to retrieve data files, cases of land ownership data files, Boundary points, to retrieve data files, Boundary points, data files, administrative sector, data files, the investigation of the district boundaries and other data files.

"Quasi-cadastral survey" method is a fast, economical and effective cadastral measurement mode. It effectively avoids the bottleneck problem cadastral survey to measure quantitative indicators have reached the national cadastral measurement accuracy. Practice has proved that. The "quasi-cadastral survey," about 70% of the cases to the results with the actual right to do the same, for the short term can not be implemented according to national norms cadastral survey of the city, the implementation of "quasi-cadastral survey" is an effective passing. To carry out its annual review of land certificates, land-change measurement to win time and initiative to the property management has guiding significance.