Tag Archives: Orienteering Map Making

ISSprOM 2019

The latest mapping standard for sprint orienteering maps, called ISSprOM 2019, has been published by the International Orienteering Federation (IOF). The document can be downloaded from the IOF website.

OCAD has implemented the new standard in their symbol sets, which you get with the latest Service Update. The ISSprOM 2019 is valid from 1 January 2020. Until then, the current ISSOM 2007 is still in use.

In order to keep track of all the different symbol sets that have been released lately, we created the Wiki page Symbol Set Overview. There you’ll also learn how to convert your maps to the new standards.

Comparison ISSOM 2007 and SSprOM 2019

Major changes:

  • Impassable vegetation (410) is forbidden to cross. Previous ISSOM 2007 Impassable vegetation symbol (421) using green 100% and black 50% has been removed.
  • Paved area with little (Brown 30%) and heavy traffic (Brown 50%).
  • New symbol for paved area in multilevel structures.
  • New symbols for passable walls, fountains and trees.

Updated ISOM 2017-2

The updated International Specification for Orienteering Maps (ISOM 2017-2) has been published by the IOF Map Commission recently.

OCAD has implemented a new function Update Symbol Set to update maps drawn according to ISOM 2017 to the new ISOM 2017-2 standard. There will be approximately 15 changes to your symbol set.

ISOM 2017 Comparison
Dialog box after updating a 1:10’000 map from ISOM 2017 to ISOM 2017-2

The changes have also been adopted to the OCAD symbol sets “Orienteering Map ISOM 2017 10’000” and “Orienteering Map ISOM 2017 15’000”. So, if you start a new map, you work automatically with the latest ISOM 2017-2 version.

Change between Drawing Modes

This function makes it easier to combine curves and straight lines. Furthermore, this drawing mode might be more intuitive for people new to OCAD.

Change between Drawing Modes

First activate the option Curve mode: Change to straight line mode when clicking in drawing area in the Preferences -> Drawing and Editing tab.

Start drawing the curve as usual. To draw a straight line, just click in the drawing area. This way, you can easy switch between straight line mode and curve mode. Double click the left mouse button to finish drawing.

Animation and more information.

 

OCAD as Cloudable Application

OCAD 2018 runs as app on clouds like DropBox or OneDrive. Install your Team or Single User Licenses in the Cloud.

Especially the installation of OCAD Team User Licenses in the Cloud, has many advantages.

– You have only one installation and it’s therefore also much easier to update
– It’s becoming easier to transfer a Team license from one member to another one
– When a Team member starts OCAD, he can choose an available license.

OCAD Tipps with Mouse and Keyboard

For the complete workflow, please visit our Wiki.

Declination / Rotate Map

Declination – Background Information

Magnetic meridians. Source: Wikipedia.

Does a compass point to the geographic North Pole? No. Does a compass point directly to the magnetic North Pole? Not necessarily.
The compass is always oriented in the direction of the local magnetic meridians and therefore usually shows neither exactly to the geographic nor straight to the magnetic North Pole. The Declination is defined as the angle between the direction of the magnetic meridians and the direction to the geographic North Pole at the observation site.
If magnetic north lies west of geographical north, the declination is called western and counts as negative; if magnetic north lies east of geographical north, the declination is called eastern and counts as positive.
An observer in middle and northern Europe sees the Arctic magnetic pole to the west of the geographical North Pole. At the same time, however, he notes that the local magnetic meridians are pointing in a direction just east of the geographical pole, so that the declination here is a few degrees east.

World Magnetic Model. Source: NOAA.

Declination varies both from place to place and with the passage of time. The reason for this are complex fluid motions in the outer core of the Earth which cause the magnetic field to change slowly with time. That’s why old maps have to be adjusted to the new declination time by time.
The declination in Switzerland is currently only around 2° and is therefore neglected in almost every map. 1° difference would mean 1.7m deviation for 100m. In the example below, you should miss the control by about 10m on the right (purple x)  when running straight with your compass ( 2.1° declination, 280m distance).

How can you adjust the Declination in OCAD?

In OCAD, there’s a new function called Rotate Map to Magnetic North.
This function considers the Magnetic declination and the Grid convergence of your current position and suggests by how much the map should be rotated. Learn more about this new function here.

In the Map Menu, there are two more functions where you could rotate your map. Do not edit the Angle in the function Set Scale and Coordinate System. Only change the angle there, if you start a new map and haven’t drawn any objects yet. The function Rotate Map is basically the same as Rotate Map to Magnetic North, but not that sophisticated.

Things to consider

Every time you rotate the map, the position accuracy of your objects is reduced a bit due to rounding differences. Therefore, we recommend not to adjust your map every year to the current declination, but maybe every fifth year.

A possible workflow would also be to rotate the map only before you print and export it. This way, you avoid rounding errors. The disadvantage is, that if you rotate the map at once with a big angle, non-rotated objects oriented to north could possible suddenly interact with rotated objects in a negative manner. Therefore, we do not recommend this workflow.