Exclude a specific query parameter from being logged in Nginx?

GET /index.html?key=latitude&otherkey=value HTTP/1.1
becomes GET /index.html?key=***&otherkey=value HTTP/1.1

Here's the code:

log_format  main  '$remote_addr - $remote_user [$time_local] $host "$customrequest" '
                      '$status $body_bytes_sent $request_time "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
map $request $customrequest {
        ~^(.*)(latitude)(.*)$   "$1***$3";
        default                 $request;
}

You can add multiple keywords like this: ~^(.*)(latitude|dell|inspiron)(.*)$

Edit:
After specification in the comment the regex needs to be modified:
GET /index.html?latitude=5570&otherkey=value HTTP/1.1 becomes
GET /index.html?latitude=***&otherkey=value HTTP/1.1

map $request $customrequest {
        ~^(.*)([\?&]latitude=)([^&]*)(.*)$   "$1$2***$4";
        default                 $request;
}