How to make a GIS vector map with AutoNavi custom map data?
페이지 정보작성자 Maybe 작성일23-02-24 15:33 조회97회 댓글0건
Original title: How to make GIS vector maps with AutoNavi custom map data? Whether it is Amap, Baidu Map or other Internet Web maps based on map services, it is impossible to obtain server-side vector data. Only limited map templates are available for web maps. Fortunately, Baidu and Gaode have launched online custom maps one after another, and users can configure personalized maps by setting different layers of color. Nevertheless, it still can not meet the needs of professional map production. For example, the two-dimensional and three-dimensional map of the following effect. Online map customization is relatively simple. Here is how to convert a small range of online slice data into GIS vector data. 1. Take Amap as an example. First, enter the AutoNavi custom map site. The method is to search [Amap API] in Baidu and enter the page as shown below: 2. If there is no account, register the account first, and then log in to the custom map page. Several default templates are provided by default. As shown in the following figure: 3. Select the [Standard] map template here, custom tape measure , which is the first template above. Click [Use this template] to enter the page. The effect is shown in the following figure: Expand the full text 4. At this point, you should already know how to do it. The first panel on the left lists the various types of label, line, and area layers. You can customize the color, transparency, and visibility of each layer. These are all the functions that can be customized provided by Golden Custom Map, and they are also the maximum functions. For example, you can set the water color to red and the expressway to purple. 5. Master the basic setting method. Next, start configuring the custom map we need to prepare for the vectorization of the data. Take Liuhua Lake o Park in Guangzhou as an example. First navigate to the park and adjust the map scale you want. 6. Our idea is to extract every layer we need. All you need to do is set all the layers to be invisible, so the background is white. Then set each required layer to black one by one and save the screenshot. The purpose of this is to enable automatic vectorization in GIS software. Take buildings and roads as examples. The screenshot effect is shown in the following figure: Building Layers: Road layer 7. Extract other layers in turn: 8. After extraction, model in ArcGIS for automatic vectorization. The idea is to select any band of each layer and then binarize the background (white) and feature (black) using [Reclassify]. Then use Grid to Face to convert the grid to a vector. Finally, use [Filter] to extract the target features. The model is shown in the following figure: 9. After the extraction is completed, some result layers are shown in the following figure: 10. Two-dimensional or three-dimensional maps can be made based on the above data. The following figure is a simple two-dimensional map made by ArcGIS. So far, the process of customizing data from Amap, then obtaining data, then processing data, and finally obtaining vector data and carrying out more free and advanced mapping is probably like this. Return to Sohu to see more Responsible Editor:. tape-measure.com
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