1.*Measuring altitude using GPS**: The Global Positioning System (GPS) can be used to measure altitude. With the help of satellite receivers, it is possible to measure the altitude of certain points in the city and thus obtain the altitude of that place.
2.*Measure with a level**: A level is an instrument specially used to measure elevation, which can directly obtain the altitude of a certain point.
3.*Using a Radar Altimeter**: A radar altimeter calculates the altitude of certain locations in the city by emitting a radar signal and measuring the time of the reflected signal, thus deriving the altitude of that location.
4.*Using a laser altimeter**: A laser altimeter is the use of a laser rangefinder to measure the altitude of certain locations in the city, and then compare it with a reference point at a known altitude to derive the altitude of that location.
5.*Use Map Tools**: You can use map tools, such as Google Earth Pro, to draw lines and shapes on the map, check the distances and sizes of different figures, and view elevation profiles.
6.Using the Standard City Model (SUM)**Based on the city's variables such as population, income, land area, building height, etc., the output value and size of the city can be calculated using the Standard City Model (SUM), which also includes elevation information.
7.*Use Triangulation**: Triangulation is a method of measuring elevation. A reference point with a known height is known, the distance and angle between the target point and the reference point are measured, and then the height of the target point is calculated using trigonometric functions.
8.*Use mobile app**: There are now many mobile apps that can be used to measure altitude, such as the "Falcon Altitude Compass" and so on. These applications typically accurately measure data such as position, altitude, speed, barometric pressure, etc., via GPS or sensors.
9.*Using Aerial Photogrammetry**: Aerial photogrammetry is a method of using aerial photography to measure terrain. By analyzing aviation**, it is possible to deduce the altitude of a certain point.
10.*Using a GIS system**: A geographic information system (GIS) is a technology system that integrates multiple disciplines such as cartography, geography, computer science, etc. Through the GIS system, various geographic information can be queried, analyzed, and managed, including altitude.