土地丈量和地形图 ( Site Survey and Topography )

第一步是要土地测量和地形图 ( Site Survey and Topography )

必须得专业技术人员，而且要有效执照。



土地测量需卫星定位，精确度在英寸级。主要找出地形图，这样一来房子的车库(Garage)，车道(Driveway)才可以设计。每个地方的建筑要求不一样，我们这要求车道只能20%最大斜坡(Slope)。

How to Calculate the Slope on a Ramp?

Instructions:

1. Measure the entire length of the ramp, from one end to the other.
2. Measure the distance from the high end of the ramp to the ground. If the low end of the ramp is not on the ground, measure from the highest point of the ramp to the lowest. This is called the rise.
3. Divide the length of the ramp by the height. This is the angle, or slope, of the ramp and is the second number in your ratio. The first number is always one. If the ramp measures 12 feet long and the rise is 2 feet, you would divide 12 by 2 to get 6, and your ratio would be 1 to 6. This means that for every foot you go up, you will need 6 feet of ramp to get you there.