Component Usage FAQ

What should I do if the console widget is not displayed properly and the widget is not displayed properly?

If a widget is not displayed properly or appears incomplete, the issue may be caused by an expired login session. Clear your browser cache, especially cookies, and then log in again.

When you use the map widget, how do you draw the boundaries of the world, cities, counties, and urban areas?

When you use the map widget, you can obtain the GeoJSON data of the geographic boundary and paste it to the Area Surface data interface of the Area Thermal Layer subwidget of Basic Flat Map. Then, customize the border style in the Mapping field based on the area codes.

Frequently asked questions when using the map tile component

Common issues and solutions related to DataV map tiles.

In a LAN, how do I call a map tile?

On a LAN, you can cache online tiles on your web server and store them as standard folder names, such as [zoom level]/[row number]/[column number].png. Then, call the tiles by using a URL such as http://ip:port/path_to_your_tile_directory/{z}/{x}/{y}.png.

What are the coordinate systems and service standards for map tiles in DataV?

DataV supports WGS84 or GCJ-02 spherical coordinates by default, sliced based on the standard Web Mercator (SRID:3857) projection. For tile services, the standard TMS tile service is used. You can access a tile service by address, such as http://webrd03.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}, where {} is a placeholder that is replaced with the actual tile row and column numbers at runtime.

How do I use data in the WGS 84 format in AMAP?

A GCJ02 basemap uses the GCJ02 coordinate system. To use WGS 84 data, you must convert the vector data. For more information, see CoordTransform.

How do I cache map tiles?

DataV does not provide built-in services or tools for caching tiles. You can use a map downloader or tile encoding tool instead.

FAQ about basemap access

Frequently asked questions about adding a DataV map basemap.

What is TMS?

TMS stands for Tile Map Service, also known as WMTS (Web Map Tile Service). For the standard specifications, see the OGC website: https://www.ogc.org/standards/wmts/.

What map services are supported by the DataV basemap? Can these map services be deployed offline?

The DataV basemap supports map services that conform to the TMS standard. For example, the basemap loads AMAP vector and projection services by default. These services can be deployed offline and integrated through the basemap layer.

Does the online basemap support offline access, that is, local deployment?

No. The AMAP basemap from default map templates or map services customized on the AMAP platform can only be accessed online.

Does DataV provide offline map tile packages?

No. The DataV platform does not provide offline tile packages. Tiles can only be used online.

How can I obtain offline map tile packages?

You can purchase offline map tile packages from AMAP or other map service providers.

If you need to access a custom base map and support offline or on-premises deployment, what options are available?

You can select one of the following solutions:

Use professional map software that conforms to the TMS standard to generate a custom basemap, such as ArcGIS Server, SuperMap, or MapServer.
Purchase custom basemap data from professional map manufacturers that are qualified for surveying and mapping and can provide offline tile packages.
Use MapBox to configure custom tiles. Custom tiles configured in MapBox support third-party standard access. The basemap layer of sub-components in the basic flat map supports TMS standard access. For more information, see

MapBox official website.

What are the advantages of DataV over BI dashboards?

BI dashboards are typically used to present business metrics, KPIs, and other key data for organizations, departments, and teams on a single screen. Compared with BI dashboards, DataV offers the following advantages:

Scenario: DataV supports multi-screen collaboration and large-screen merging with 8K and higher resolutions, making it ideal for exhibitions, real-time data monitoring, geographic data analysis, and multidimensional data presentations.
Display media: DataV projects can be displayed on large screens, televisions, computers, and mobile devices.
Visual effects: DataV provides exquisite dynamic visual effects.
Customization: DataV allows you to customize widgets based on your business needs.
Display of geographic data: DataV provides both 2D and 3D spatial engines to display geographic data on 2D and 3D maps.
Rich third-party components: DataV integrates a variety of third-party components, such as ECharts and AntV. You can find more third-party widgets in the Alibaba Cloud Marketplace.