How do you read a Topo50 map?
To explain scales graphically, look at a 1:50 000 scale Topo50 map. The first number of the scale (1) represents a core unit of distance on the map, while the second (50 000) represents that same distance on the ground. In this case, one centimetre on the map represents 50 000 centimetres, or 500 metres, on the ground.
What is the scale of a NZMS 260 map?
The NZMS 260 Topographic map series began in 1977 and ended production in 2009. The series was produced at the 1:50,000 scale.
What are topo sheets?
In modern mapping, a topographic map or topographic sheet is a type of map characterized by large-scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but historically using a variety of methods.
What do the lines on a topo map mean?
The topography is represented by contour lines, which are imaginary lines. Every point on a particular contour line is at the same elevation. These lines are generally relative to mean sea level.
How do you read NZTM coordinates?
Understanding NZTM Grid Co-ordinates
- eastings – these are the vertical lines running from top to bottom (north to south) on a map. They divide the map from west to east.
- northings – these are the horizontal lines running from left to right (west to east) on a map. They divide the map from north to south.
Where can I download free topographic maps?
The National Map Download Client — Download digital Historical topographic maps (GeoPDF and GeoTIFF formats) and US Topos (GeoPDF format). Map Locator on the USGS Store — Search and download free digital maps in GeoPDF format or order paper maps. This is the only USGS site for ordering paper maps.
What do contour lines look like?
Contour lines are generally illustrated as a brown line. Individual contour lines on a topographical map are a fixed interval of elevation apart known as a contour interval. Common contour intervals are 5, 10, 20, 40, 80, or 100 feet.
What are the uses of topo sheets?
One can use toposheets for planning of a building complex, an industrial plant, a railway and an irrigation project. One can plan Bridges, tunnels and dams from the toposheets. These are also helpful for directing military operations at the time of war.
What are the 5 Rules of contour lines?
Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.
What are 3 types of contour lines?
There are 3 kinds of contour lines you’ll see on a map: intermediate, index, and supplementary. Index lines are the thickest contour lines and are usually labeled with a number at one point along the line.
Where can I find official LINZ topographic maps?
For official LINZ topographic maps please contact an authorised paper map retailer. select the specific Topo 250 or Topo50 map you want from the options presented. We also produce data files (Shape and other file formats), which you can find and download free through the LINZ Data Service.
What is Linz_map_sheet object class?
This page describe the linz_map_sheet object class used to represent objects in the NZTopo topographic database. Polygon for each Topo50 map sheet holding extents of each sheet, it’s sheet code, name, edition, and revision statement.
What are Linz’s basemaps services?
LINZ’s basemaps services allow you to embed our Aerial Imagery directly into your web, mobile or GIS application. You are welcome to reproduce LINZ maps at no cost.
What is the Linz Topo50 ID?
A unique identifier for use on Topo50 data in the LINZ Data Service. This is not a universal ID. The intention is to manage these ID’s as persistent, however this is not guaranteed and there will be instances where what appears to be a minor change to a feature may result in a new ID being assigned.