Mapping Strategies

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Two different mapping methods

For adding a map feature to the OSM database a GPS coordinate is required.
Keypad-Mapper 4 provides two different ways for determining the GPS coordinate of a new map feature.
These two options basically mean, that the mapper has the choice to optimize the throughput while walking around OR he/she can do all work immediately and then relax when coming home.

Mapping with GPS Receiver

For this method the mapper must switch the GPS receiver of his Android device on.
Each time the mapper adds a new element to the OSM database the GPS coordinate is used reported by the GPS receiver, which is built into the mobile device, at the moment the information is stored into the database.

Typical process using the GPS receiver:
Example: house numbers:
Walk down the road and type something like

5 - left-arrow
6 - right-arrow
7a - left-arrow
7b - left-arrow

etc. on the keypad screen.
You can do that without (!) stopping in front of each house number.
This way, you can easily record 250 house numbers per hour in a city.
Advantage: this is an extremely efficient and straight forward way for mapping for example house numbers while just walking down the road.
Disadvantage: GPS is not very precise, so after coming home the data must be optimized in JOSM or some other OSM editor based on some imagery (e.g. Bing maps).

Other example: traffic signs:
while sitting as a co-driver in a car the mapper can record all traffic signs passing by by just tapping on them the moment a traffic sign passes by.
If he/she would need to pan the map to the correct position for each traffic sign, it would not be possible to record any traffic sign while sitting in a moving car.

Mapping without GPS Receiver

Switching the GPS receiver on is not needed in this case which means, that the battery of the device will last significantly longer compared to the GPS receiver centric approach described above.
Instead for each new element to be added to the database the mapper shows the precise position on the map by zooming and panning the map accordingly.

Typical process using the map instead of the GPS receiver:
Example: shops
In this case the process of recording the data is as follows:
1) walk to the first entrance
2) stop walking
3) zoom/pan the map to the correct position
4) enter the shop information based on a map feature template and save the data
5) resume walking to the next entrance
Advantage: no additional work later at home with fine tuning the GPS coordinates
Disadvantage: significantly more time needed for recording the data outdoor

Mapping House Numbers in an Unmapped Area

We recommend the following workflow for mapping house numbers in an unmapped area:

  1. select area without house numbers
  2. go to this area
  3. launch the Keypad-Mapper on the mobile device and activate the GPS receiver
  4. open the navigation menu by tapping on the app icon 25px
  5. tap on the ENAiKOON-Keypad-Mapper-3-icon-keypad-no-glow.png icon for opening the keypad screen
  6. execute the Mapping with GPS Receiver

Mapping Missing House Numbers in a Mapped Area

We recommend the following workflow for mapping house numbers in a fairly well mapped area:

  1. select area with some existing house numbers
  2. go to this area
  3. launch the Keypad-Mapper on the mobile device and activate the GPS receiver
  4. open the navigation menu by tapping on the app icon Keypad-mapper-wiki-icon-v4.png
  5. tap on the missing house numbers ENAiKOON-Keypad-Mapper-3-icon-missing-house-numbers-no-glow.png icon
  6. slide the slider to the right that defines which streets around you should be mapped
  7. wait until a list of streets is shown
  8. tap on the street you want to work next on
  9. execute the Mapping with GPS Receiver by tapping on the left arrow ENAiKOON-Keypad-Mapper-3-icon-left.png, right arrow ENAiKOON-Keypad-Mapper-3-icon-right.png or by tapping on the house-does-not exist ENAiKOON-Keypad-Mapper-3-icon-house-does-not-exist.png icon;
    the mapped house numbers disappear from the list of missing house numbers; as soon as all missing house numbers of a street have been mapped, the app returns automatically to the list of streets with missing house numbers

Mapping POI like Map Features

For mapping POI like map features both options are feasable: