How to make an electronic map? How many processes? With what software?

The development process of Daodaotong is forwarded to you for a look.

To complete a map, you have to go through 74 strict procedures.

The basic data of Daodaotong navigation electronic map, especially the navigation road network data, are obtained through long-distance friendly field surveying and mapping! Not only the location is accurate, but also the information points are extremely rich, and all kinds of navigation elements and required information are very complete.

Collect and accurately draw every road that can actually be opened to traffic, including some roads that can't be opened to traffic (alleys, pedestrian streets, roads under construction, etc.). );

Collect and accurately draw the internal roads of some enterprises and communities in detail;

Every road on the navigation map should reach the level of accurate navigation;

Accurately represent every POI (information point) related to human activities in the field;

Accurately navigate to the POI (information point) represented on each map;

Collect road traffic information in detail.

Road networks at all levels collected in the field

All roads in the electronic map of Daodaotong navigation adopt GPS to collect tracks on the spot, and record the information such as road name, road width, number of lanes, pavement properties, smoothness, one-way street, traffic rules and so on in detail. Only through field collection can the accuracy and present situation of navigation data be guaranteed (the large-scale data provided by traditional surveying and mapping are generally accurate enough, but the present situation is seriously insufficient). Compared with the remote sensing images in the same coordinate system, the position accuracy of Daodaotong navigation electronic map is all controlled within 10 meter.

Scientific and reasonable route design

Roads with green belts, railings and even and odd yellow lines are regarded as isolated roads. The map shows two navigation line, upward and downward, while navigation line is located on the center line of a single road. It can better reflect the relationship between the upstream and downstream roads, the U-turn line between the upstream and downstream roads, and the changes in road zoning at intersections. The unpartitioned road map is represented as a single-line navigation line, and the location of navigation line is on the center line of the road. In this way, in the course of navigation, the driving position and route are more consistent with navigation line on the map, and the navigation effect is enhanced.

Create a graphic file of complex intersection points

Record the traffic information and notification route of all complex intersections in detail. These include: whether there are traffic lights, no turning information, no walking information, number of straight lanes, number of left and right lanes, etc.

Advanced surveying and mapping method of overpass

Overpass is the key point to show the navigation ability of navigation map. Ruitu Wanfang collected each overpass on the spot, carefully drew the plan of each bridge, and recorded the driving routes in different directions to ensure that you can follow the correct route when crossing each overpass.

Make sure the route connection is accurate.

Truly reflect the relationship between superiors and subordinates.

Correctly mark the location of ramps and entrances and exits.

Detailed schematic diagram and photos of overpass.

Detailed indication information of fork road.

Comparison of navigation line Location of Overpass and Remote Sensing Image Comparison of navigation line Location of Road and Remote Sensing Image

The electronic map of Daodaotong Navigation describes the traffic rules information of all roads and intersections in detail. Including traffic lights, isolation belts, no turning, no walking, speed bumps, U-turn position, number of straight lanes, number of left and right turning lanes, etc. For complex overpasses, the electronic map of the road navigation can accurately indicate the positions of ramps and entrances and exits, and accurately express the connected topological relationship between the main and auxiliary roads and the upper and lower floors of the overpass. Thereby ensuring the accuracy of the path planning of the electronic map of Daodaotong navigation.

Scientific development process

In the whole development process of navigation electronic map, including field information collection, field inspection, indoor production, indoor inspection and data conversion, a set of efficient and rigorous navigation electronic map development process has been established for a long time.

The production of navigation electronic map in each city needs 74 production links.

The production of electronic navigation maps in cities needs to go through the 18 prosecution link.

Strict quality management system

In the whole development process of navigation electronic map, we have established a set of production technology, quality management norms and quality inspection tools of navigation electronic map with major intellectual property rights, and created some unique quality control methods including simultaneous development and inspection of indoor and outdoor industries. More than 10 quality control points are established to control the quality of map development process.

Strict quality monitoring system

There are many links in map making, many participants and a large amount of data. Without a strict quality control system, the quality of maps can never be guaranteed. Long-distance friendship attaches great importance to the quality management of navigation charts and has established a set of quality assurance system with its own characteristics.

Strict and complete quality inspection system

Systematic and comprehensive operation specification documents

Quality concept of continuous improvement

Scientific and reasonable production technology

Through 12 years of map making experience and accumulation, Chang Di Friendship has summed up a set of scientific and reasonable production processes to ensure that all links are synchronized with the field.