The QGIS tool is one of the tools used in our map business field. The theory will not be introduced first. Today we mainly introduce basic operations such as installation and use:
1. Download and install
1. Official website download
Show page:
Different versions are available. Let's take 3.28 as an example, click to enter:
Just click to close, and then download directly
2. Installation process
Double-click directly, fool-like installation, until it is completed; after the installation is successful, there is a new folder on the desktop:
Click after entering
Then it can be used, the first loading is slow:
2. Data processing
1. Home page
The disk of the local computer is loaded, and you can click on the prepared test file to verify a process. Next, we will use a vector file point coordinate configuration style to demonstrate.
2. Page language setting
Click Settings --> Options (the last button)
Here I have sinicized in advance, and the page is in English by default.
3. Find the file
double click
Enter the layer list below, select the state, the default map is on the right, and the color is the default configuration of Qgis.
4. Custom configuration color
Double-click the layer or right-click the layer to select properties and enter
This is the default style, and the page menu is very operable, such as selecting a color;
layer changes
5. Configure the progressive ribbon
1) Select progressive in the top line;
2) Value: Select the appropriate attribute according to the parameters of the layer;
3) Color gradient: There are a variety of color bands inside, choose according to your needs;
4) Class: The class in the lower right corner represents the division of the value range into several segments. After selection, it will be displayed directly
5) Click Save, the layer changes:
Only a few places are set here, and more can be set according to needs, and Baidu can be queried when necessary.
6. Export SLD style file
This is a commonly used function point. After the demonstration is completed on the QGIS software, after exporting, the SLD file can be imported into geoserver to configure the style for the layer. The previous articles have been shared and can be read; there are two commonly used export entries :
1) Right click on the layer
Enter, choose to save as QGIS layer style
Choose format and save address:
Here we choose the SLD format:
Click OK,
Just look for it on the disk.
2) Double click on the layer
Click on the style, choose to save the style, and the subsequent operations will be consistent with the previous scheme.
In short, there are many available functions on Qgis, and you can check them yourself when you use them. I am only here to serve as an introduction.
The QGIS installation and simple use process are shared. Through the simple use process, you can draw inferences from one instance and learn by analogy; you can also understand its basic principles during use. For example, this article is better:
theoretical reference . For the supported data types, please refer to: data type support ; it can be regarded as avoiding repeated wheel creation. In the next article, we will briefly introduce the basic use of ArcGIS, so stay tuned!