How to apply offline maps to microcontrollers?

御坂10032号

How to apply offline maps to microcontrollers? [Copy link]

 

 

Guys, I want to make an offline map module recently. The specific logic is to use a single-chip microcomputer to parse the GPS module to obtain longitude and latitude and other information. Then display these data on a screen. But I don’t know how to make this map? And how to draw and display this map. Has anyone done it before? Can you share the specific implementation ideas?

xiaolinen

Keep paying attention and learn some unique skills from the masters!

tagetage

If you want to make a map, it is better to use a system such as Windows or Linux.

御坂10032号

tagetage posted on 2024-8-8 23:06 If you want to make a map, it is better to use a system. Windows or Linux, etc.

Linux is also fine. I have a Raspberry Pi, do you have any ideas?

吾妻思萌

If you have a library, try echart, Baidu, or Python's geo.

tagetage

Raspberry Pi obtains longitude and latitude through antenna + GPS and calls Amap API to mark points on the map

There are many similar materials. Find them yourself.

wangerxian

You can take a screenshot of the map image on the computer and send it to the microcontroller.

秦天qintian0303

The single-chip computer is a bit difficult to use, the computing power is not enough, and the offline map is several megabytes at any time, so you have to run a system anyway.

御坂10032号

tagetage posted on 2024-8-9 09:35 Raspberry Pi uses antenna + GPS to obtain longitude and latitude and calls Gaode map API to mark points on the map. There are many similar materials. You can find them yourself.

Please advise me. If I follow the instructions in this post, I can do all these. What I don't understand is how to drive a screen to display the map? The Raspberry Pi can achieve the functions in the post above, but I don't know how to display it on the screen.

御坂10032号

wangerxian posted on 2024-8-9 09:49 You can take a screenshot of the map image on the computer and send it to the microcontroller.

This may not work because this map is offline. You also need to update the location on the map in real time based on the current GPS if it is a screenshot.

tagetage

What I don't quite understand is, how to drive a screen to display the map? Raspberry Pi can achieve the functions in the above post, but I don't know how to display it on the screen------Raspberry Pi has a display interface, so I can directly use the HDMI of Raspberry Pi to connect a small screen.

tagetage

Misaka 10032 posted on 2024-8-9 13:14 Please give me some advice. If I follow this post, I can do all these. What I don't understand is how to drive a screen to display that location...

The Raspberry Pi comes with a display driver, so you don't need to write one yourself.

From the way you asked, I guess you are a student, not working on your graduation project.

wangerxian

Misaka 10032 posted on 2024-8-9 13:15 This may not work, because this map is offline. It is also necessary to update the location on the map in real time according to the current GPS. If it is a screenshot...

I feel that it is difficult to manage offline. Baidu's offline map takes up dozens of MB for one city, which would be difficult to manage for the whole country.

御坂10032号

tagetage posted on 2024-8-9 13:34 Raspberry Pi comes with display driver, you don't need to write it yourself. From what you asked, you sound like a student, not a graduation project.

What graduation project should I do? I mean, how can I display the map on a SPI screen like a Raspberry Pi zerow 2. I don't need specific code. I just want to know how the display logic works. I don't know how to parse and display the offline map on the screen. If you say HDMI, then just connect it to an external display. But it's not actually the case. How to parse and draw the map specifically. I don't understand this.

御坂10032号

wangerxian posted on 2024-8-9 13:44 I feel that offline maps are not easy to use. Baidu's offline map takes up dozens of MB for a city, and it would be difficult to use the entire country.

I see Xtrack is very popular online. Although it is open source, I don't understand it. My GPS module has already analyzed the data. I just don't know how this map is made.

tagetage

What I mean is how to display the map on a screen similar to SPI-----you can buy a screen corresponding to the Raspberry Pi. There are many on Taobao.

御坂10032号

tagetage posted on 2024-8-9 19:23 I mean how to display the map on a screen similar to SPI-----you can buy a screen corresponding to the Raspberry Pi. There are many on Taobao...

Ok, thanks, I'll study it and see how to make it.

wangerxian

Misaka 10032 posted on 2024-8-9 18:45 I see that Xtrack is very popular online. Although it is open source, I don’t understand it. The GPS module here has already parsed the data. I just don’t know this...

Study its source code. https://github.com/FASTSHIFT/X-TRACK

hellokitty_bean

Misaka 10032 posted on 2024-8-9 18:44 What graduation project to do, I mean how to display the map on the SPI screen. Raspberry Pi zerow 2. I don't need...

So, it is a problem with the map display?

I don’t know what format the offline map is in, raster or vector?

I don't really understand, I'm just curious...

hellokitty_bean

Maps have unique formats. If you use raster maps, you read images.

Vector maps, such as ESRI ArcGis's shp format, can be imported into the geopandas library in Python