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Visualization of residential house prices
2022-04-23 18:00:00 【Be happy to study today】
Visualization of house prices in second-hand residential areas in Wuhan
1. Data collection and preprocessing
The data of second-hand housing in Wuhan were collected from Wuhan public service platform 54000 strip , Double check the data 、 Address standard processing 、 After removing the null value, we get 2960 Cell data . However, the lack of longitude and latitude information can not be visualized , So with Baidu API Geocoding .
2. Call Baidu API Geocoding
Applied for Baidu API Of AK after , Call its geocoding function , Obtain the longitude and latitude according to the cell address , Finally, it is sorted out as the price of second-hand housing community in Wuhan shp data .
3. Use QGIS Coordinate correction
Use the coordinates directly , And discovery and existing reality poi The position does not match , It is found that the coordinate system used by Baidu map needs secondary conversion , So I decided to use it QGIS Geohey Plug in processing . Reference resources QGIS Coordinate transformation
4. Nuclear density analysis
Arcgis The kernel density analysis function obtains the final layer , It turns out that h It's the river bank 、 Jianghan 、 Houses in Wuchang district are more expensive .
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