Real estate mapping mainly refers to the work of determining the location, ownership, boundary, quality, quantity and present situation of urban houses through measurement and investigation, and expressing it in the form of words, data and maps. It is also commonly called attribute measurement. The purpose is to provide data and information for real estate property rights, property rights registration management, real estate development and utilization, transactions, tax collection and urban planning and construction. It has four aspects:

1, the role of law;

2. The role of finance and economy;

3. The role of social services;

4, the role of surveying and mapping services. The contents include: real estate plane control survey, real estate survey, real estate element survey, real estate map drawing, real estate area calculation, change survey, results and data inspection and acceptance, etc.