Topographical Maps and Survey Markers
The main source for topographical Maps in Canada is Natural Resources Canada .
Example of a topographical Map
Copyright Notice
Copyright - Her Majesty the Queen in Right of Canada, reproduced with permission from Natural Resources Canada.
The above map is known as 031B/12. It is a 1:50,000 scale map.
Where to get topographical Maps.
You can go to the following location
In ontario the Ministry of Natural Resources, produces a map called the Ontario Base Map.
For info on Ontario Base Maps
Survey Markers
A survey marker is a marker. such as small disk in which accurate geographical co-ordinates are known for.
For some types of astronomy you need to have accurate geo co-ordinates in order for the observations you have made to be used by other people.
Survey Marker
Where to find survey markers
In the USA
National Geodetic Survey ( NGS )
The info on there survey markers are called datasheets. They have info on some, of the survey markers found in Canada.
In Canada
Geodetic Survey Division ( GSD )
In Ontario
Ministry of natural resources ( MNR )
For other provinces
GPS - Global Position System
GPS uses satellite in earth orbit, to determine your location on earth. By timing how long it takes a signal to reach yout receiver from the satellite, knowing where the satellite is in orbit and other things, you can find your location.
GPS receivers
