YMP: Information for Mappers

Thank you for signing up to be a mapper with the OUSA Youth Mapping Program! This page is designed to be a reference for new & existing mappers as well as those who are considering joining the YMP Mapper team.


  1. Mapper: After reviewing the expectations of mappers as laid out in the contract language, apply to be a mapper with the YMP program.
    1. YMP: Decide on the application. Send the mapper additional information and an invitation to the google group for mappers (YMPmappers).
    2. Mapper: Provide YMP any additional information required (e.g., IRS W-9 tax form). Accept the invitation to the google group. Follow and contribute to the discussion.
  2. YMP: Assign Mapper and Map Consultant to a map project; prepare contracts
    1. Mapper: Work out contract details with YMP (e.g., size of map; schedule; paid vs volunteer)
    2. OUSA, Mapper: Sign contract.
  3. Mapper: Contact the Youth Organization and talk about the field checking process .
    1. YMP provides useful Remote Mapping and Field Checking Tips on how to guide an inexperienced field checker to review the map.
    2. Perform work.
      1. Mapper should provide status updates to YMP at least once a month until the project is completed.
      2. Submit periodic drafts for Map Consultant to review.
    3. Instruct and communicate with the Youth Organization-provided field checker.
      1. Whenever possible in ongoing communications, encourage and advise the Youth Organization on using the map for teaching and introducing more kids to orienteering.
  4. Map Consultant: Review drafts and provide feedback to mapper.
    1. Mapper: Revise map together with field checker.
    2. Submit final version to the Map Consultant
  5. Map Consultant: Request any final adjustments and releases the map.
    1. Mapper: Make final adjustments.
  6. Mapper: Submit final map and invoice.
    1. Please include contracted payment amount, map size and number of hours spent (even though payment is based on area).
  7. Get paid (if not 100% volunteering)

Mapping & Branding Guidelines

Clean and consistent maps depend upon mappers having a good understanding of mapping standards and OUSA Branding conventions. YMP Mappers should become acquainted with the following standards and resources:

  • Map scale and symbol set
    • Fit on Letter paper.
    • Include branding, legend, explanatory text, title, copyright, version date, and other key elements.
    • Scale should be appropriate for the project; typically 1:1000 – 1:4000
    • Use good safety bounding.
    • Primary data sources are usually LiDAR data and aerial imagery.
    • Use the School Symbols Set or ISSprOM from IOF.
  • Map guidelines
    • Use OCAD 12+ or OOM (saved as OCAD files).
    • Geo-reference in UTM coordinates.
    • Magnetic north lines should be spaced 120 meters on 1:4,000 maps, cut appropriately to maintain legibility (e.g. crossing same color symbols or when obscuring point features).
    • The map should not show flaws at blown-up scales (which are likely to be used in teaching).
    • Layout objects are clean and easy to read.
      • Please don’t use the layout object layer of OCAD as it may not be compatible with OOM or older versions of OCAD. Put all layout objects and logos in the main symbol layer of OCAD.
    • Follow IOF legibility and orientation requirements:
      • Vertex (normal, corner, dash) of linear features shows proper relationship.
      • Trails join at the center of black dashes while indistinct trail junction symbols do not connect
      • Trail / stream crossings indicate the presence/absence of a footbridge.
      • Side symbols for walls and fences avoid breaking at corners.
      • Contours are (virtually) cut when crossing small ditches (brown dots), pits (brown Vs), depressions (brown Us), knolls,and earth banks if they can not sensibly deviate around them.
      • Minimum gaps between symbols of the same color
      • Area feature minimum size and width maintained
      • Line feature minimum size maintained
      • Point features that are required to be oriented to Magnetic North (V pits, U depressions, etc.) ensured
      • LiDAR contours appear smooth
      • Border lines between area features do not have gaps (typically white)
  • Layout and branding: Use our sample OCAD files for standard look and feel.
  • Map information meta-data: Provide the elements we require.
  • Use our file naming convention and know the submission procedures.

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