面积量算系指水平面积量算。面积量算的内容包括宗地面积、地类面积、宗地内建筑占地面积、建筑面积量算与面积汇总统计。

　　一、面积量算方法

　　面积量算方法一般分为解析法和图解法两种。

　　（一）解析法

　　根据实测的数值计算宗地面积的方法，包括坐标面积计算法和几何图形计算法，计算公式见教材101页所谓几何图形计算法是根据实地丈量的距离计算面积，将规则图形分割成简单的矩形、梯形或三角形等简单的几何图形，分别计算面积并相加得到所需图形的面积。计算面积所需边长量至厘米。几何图形计算法主要用于宗地内建筑占地面积及建筑面积量算，不具备采用坐标法面积计算宗地面积的小城镇可采用几何图形法计算宗地面积。

　　（二）图解法

　　在地籍图上量取求积所需元素或直接在地籍图上量取面积的方法。图解法包括图解坐标法、光电面积量测仪法、求积仪法、几何法（图解几何图形求积元素后按公式计算面积）以及方格网和网点法等。图解法主要用于宗地内地类面积计算。

　　二、面积量算的要求

　　面积量算应有检核，以防止粗差的产生并对面积量箅成果进行控制与平差。对于未采用计算机解析法量算面积的，均应独立进行两次量算，两次量算的较差在限差内的取中数，两次量算的较差应满足下式：

　　P≤0.000 3M／F（3—18）

　　式中：P——量算面积；

　　M——地籍图比例尺分母。

　　街坊内各宗地面积之和与街坊面积误差小于1／200时，将误差按面积分配到各宗地，得出平差后的各宗地面积。完全用实测数据计算（量算）的宗地面积可以不参加平差。

An area of measuring and calculation means the horizontal area of measuring and calculation. An area of measuring and calculation includes cases of land area, land type area, were in the construction area within the building area of measuring and calculation and area summary statistics.

An area of measuring and calculation method

An area of measuring and calculation methods are generally divided into two kinds of analytical method and graphical method.

(A) Analytical method

According to the measured values were in the area calculation methods, including coordinate geometry area calculation method and calculation method, see the textbook formula 101 so-called geometry calculation method is based on measuring the distance calculation of the field area will be divided into simple rules of graphic rectangle , trapezoidal, or simple geometric shapes such as triangles, were calculated and added to obtain the required area of graphic area. Calculate the amount of space required to cm side length. Geometry calculations were mainly used in the construction area and construction area within the volume of calculation, do not have the use of Coordinate area of the small towns were in the area can be used geometric method to calculate Parcel Area.

(B) graph

The amount of the cadastral map to take the necessary quadrature element or directly in the cadastral map to take the amount of area method. Graphic method, including graphic coordinate method, optical area measurement instrument law, planimeter method, the geometric method (graphical elements in geometric quadrature formula after the press area) and the grid network and the network method. Graphic method is mainly used for cases in class area of the mainland.

Second, the requirements of an area of measuring and calculation

An area of measuring and calculation should check, in order to prevent the production of gross errors and the amount of grate area of control and adjustment of results. Did not use a computer analysis method for the amount of calculation in size, twice the amount of calculation should be independent, twice the amount of calculation of the poor to take within the limits of the number of poor, twice the amount of calculation of the poor should meet the following formula:

P ≤ 0.000 3M / F (3-18)

Where: P - the amount of calculation area;

M - cadastral map scale denominator.

Neighborhood in all cases, and with residents to an area of the area error is less than 1 / 200, it will be assigned to all cases, the error according to an area of land obtained in all cases, after adjustment to an area of. Fully with the measured data of (volume calculation) of the cases in an area of adjustment may not take part.