# Loading an empty map for the map server for outdoor navigation

**URL:** <https://get-help.theconstruct.ai/t/loading-an-empty-map-for-the-map-server-for-outdoor-navigation/14908>\
**Category:** Open Discussions\
**Tags:** map\
**Created:** [January 21, 2022, 1:38pm UTC](https://get-help.theconstruct.ai/t/loading-an-empty-map-for-the-map-server-for-outdoor-navigation/14908 "2022-01-21T13:38:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Abhijit03](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/a/71e660/32.png) [@Abhijit03](https://get-help.theconstruct.ai/u/Abhijit03)\
**Post date:** [January 21, 2022, 1:38pm UTC](https://get-help.theconstruct.ai/t/loading-an-empty-map-for-the-map-server-for-outdoor-navigation/14908/1 "2022-01-21T13:38:52Z")

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Hi,

I am trying to implement autonomous navigation based on gps on a real robot for outdoor environment like a park/open filed. I follow the extra class and the rosject provided by the construct titled " **How to use GPS to do autonomous robot navigation**" and I read that you need to pass an empty map to the map server which is large enough to cover the whole area you want the robot to move on and I want to know how to obtain/create the .pgm image file of for such an environment ?

I understand that both the .pgm and .yaml files are automatically created my map server when saving a map produced by using packaged like gmapping but in my case the outdoor environment is a park/open field.

Can you please guide me ?

Regards,  
Abhijit

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<div class="post-metadata">

**Author:** ![Abhijit03](https://get-help.theconstruct.ai/letter_avatar_proxy/v4/letter/a/71e660/32.png) [@Abhijit03](https://get-help.theconstruct.ai/u/Abhijit03)\
**Post date:** [February 3, 2022, 3:21pm UTC](https://get-help.theconstruct.ai/t/loading-an-empty-map-for-the-map-server-for-outdoor-navigation/14908/2 "2022-02-03T15:21:39Z")

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Could I get a reply on this ?

Regards,  
Abhijit