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---
title: Workshop Deck
description: Mapping public schools with OSMaPaaralan
tags: OSMaPaaralan
---
# #MapaTime:: OSMaPaaralan
>OSM + map + Paaralan
>
>This [pad](/5WA7UUsbS4eEJNIz44nZBw) is online: hackmd.io/@osmph/HyPPrC6Z7
---
>![](https://i.imgur.com/q4Uo8rh.png)
>A public school as a temporary flood shelter. © 2018 CNN.
---
### :bulb: Info for experienced mappers
----
### :school: OSMaPaaralan
Go to the MapRoulette [challenge № 9413](https://maproulette.org/browse/challenges/9413): **is.gd/mrc9413**
Watch the [demonstration video](https://open.tube/videos/watch/2b09dfd7-a1e2-4fae-9ca8-5ef8df2e5c3b).
---
### :bookmark_tabs: Background
[MapaTime & OpenStreetMap](/pfEp_q3US3qZcunKLFl6vQ)
---
###### Ang mga guro ng Malining, QUE (2018-07)
{%youtube 5lMEkeKzZh8 %}
Note:
To get to their assigned school, three teachers walk for three days (cross 6 rivers) from Tanay, RIZ through the Sierra Madre mountain range, to barangay Umiray, Nakar, QUE
----
![](https://i.imgur.com/0FyeGFV.png)
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[![](https://i.imgur.com/5ZGt1Yw.jpg)](https://osm.org/go/4zkkz8~7J--?m=)
---
## PHL public schools
- de facto **community centers**, and settlement landmark
- serve as **polling precincts** during elections
- provide **temporary shelters**, during emergencies
Note:
Motivation - why?
Effort will also reduce number of un-mapped settlements in OSM, by adding the basic features found in neighborhoods, villages (barangays) and remote hamlets (sitios).
Using **RapiD**, ML road detections are validated, too.
---
## :dart: Goal
Improve school geodata on OpenStreetMap, using DepEd CY [2013](http://data.gov.ph/catalogue/dataset/201-enrolment-data---elementary-and-secondary) (archived [here](https://github.com/OSMPH/deped_schools_db), cleaned-up [here]()) with [explicit permission](https://github.com/OSMPH/deped_schools_db/blob/master/data/DepEd_Letter_to_OSM_20132012.pdf) to integrate under ODbL.
---
## :chart_with_upwards_trend: Statistics
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### PHL school data growth rate
![](https://i.imgur.com/izBDrzd.png =750x)
----
{%hackmd Wo65-6_uSWecqhWShnh4uQ %}
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:clock1030: A beginner, after ~30 minutes of on-boarding, may take **~8** minutes to map the recommended minimum features. (Experienced mappers: ~4 minutes)
:calendar: With 33,942 schools to validate, the effort is expected to take 566 working days to complete.
Note:
Calculating using the past average rate (~1,800 schools added per year), it would take the community 15 years to validate the remaning 24,560
At 5,000 schools per year, 5 years.
---
### What to map?
- school grounds
- buildings
- crossings and highways
---
### :pencil: It's MapaTime
----
#### On-boarding -- 30-60 minutes
* MapRoulette walk-through
* iD editor [walk-through](https://mapwith.ai/rapid#background=Maxar-FB&disable_features=points,buildings,landuse,boundaries&map=18.51/9.16609/124.64325)
* Sign-up for OpenStreetMap account
---
#### Screenshots
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#### Overview
![](https://i.imgur.com/mGqgOaR.jpg)
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##### Identify extent from imagery
![](https://i.imgur.com/TyfMRMJ.png "Identify school")
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##### Trace school grounds
![](https://i.imgur.com/wTIQKYv.jpg "Draw school grounds")
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![](https://i.imgur.com/oOvAttV.png "Draw other features")
> Draw other features
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##### Tag the features you just created
![](https://i.imgur.com/OAexqTC.png)
> The white polygons in this photo are still untagged. Red polygons are marked as buildings.
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##### Resolve warnings before savings edits:
![](https://i.imgur.com/Qrm0rf7.png)
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##### Merge the school node with the ground polygon
![](https://i.imgur.com/AnIGnF2.png "Merge POI with grounds")
> In **iD**: Shift click on both features, then right click and select Merge. In **JOSM**: Shift-click on both features, and press `Ctrl+Shift+G` (Replace Geometry).
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##### Improve existing features
> Complete acronyms (E.g."Elem" to "Elementary") and typos: ![](https://i.imgur.com/FCZIiIc.png)
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> Trace paths and roads and connect them to existing highways: ![](https://i.imgur.com/04AdxrM.png)
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:::warning
> Watch out for issues like overlapping polygons ![](https://i.imgur.com/cqL03qX.png)
> Fix them before you save.
:::
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##### Current feature attributes
![](https://i.imgur.com/X6VqrX2.png)
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##### Append the tags to feature (GIF)
![](https://i.imgur.com/9xziI5N.gif)
Note:
* Select the school grounds, focus on the left panel
* Hide "All Fields", Click "All Tags"
* Switch from "list" to "text" mode
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##### Leave helpful changeset comments, and attend to issues, if any
![](https://i.imgur.com/6czkg5L.png)
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##### Click the Upload button to save
![](https://i.imgur.com/lkYMJgs.png)
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:::info
Not confident with your edits? Mark the checkbox to flag the changeset for review by other volunteers
:::
---
### Typical school grounds on imagery
* long, rectangular buildings arranged around an open space
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#### Photo #1
Imagery | OSM data, overlaid
---| ---
![](https://i.imgur.com/dcvhOWg.jpg) | ![](https://i.imgur.com/nBWoPtc.jpg)
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#### Photo #2
Imagery | OSM data, overlaid
---| ---
![](https://i.imgur.com/fFK36Bd.jpg) | ![](https://i.imgur.com/zWetrzJ.jpg)
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#### Photo #3
Imagery | OSM data, overlaid
---| ---
![](https://i.imgur.com/EfLPi5l.jpg) | ![](https://i.imgur.com/gPWPVJI.jpg)
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#### Photo #4
![](https://i.imgur.com/8p8ESHi.png)
Note:
When in doubt about the extent of the school grounds, use a node.
---
## :reminder_ribbon: Reminders
* Marker location accuracy is **not** authoritative. Review and confirm with imagery (aerial, or street-level.)
* Only **add** the task if
* No school found on location
* School name matches the task name/old/alternative name
----
* Add school ground **area** if you can determine its outline, otherwise, map the school as a **node**
* Unlock the task, or skip if
* Task name doesn't match school name on the map
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**What to map?**
* School grounds (area)
* School buildings (area)
:::spoiler Extras
**What else?**
* Marked Crossings (point)
* Align roads and buildings
* Correct errors, if any.
:::
---
### Sample imagery
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How imagery looks like:
![](https://i.imgur.com/l38OxKJ.png)
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Mapped features (iD):
![](https://i.imgur.com/xyY9XfT.jpg)
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Mapped features (JOSM):
![](https://i.imgur.com/ElxRK7G.png)
Note:
JOSM users: use `CTRL+V` to paste tags copied from MapRoulette
---
## Issues
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### Editing Issues
* **Only** add tags to school grounds, not buildings
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### Known data issues
* location data issues
* multiple schools sharing the same geographic coordinates
* inaccurate location (up to several kilometers away)
* improbable location (middle of nowhere)
* Typograhpical errors
* Incomplete data set (new schools after 2013, senior high schools, private schools)
* Screenshots of issues in this [album](http://pygy.co/BAz)
---
## What's next?
Schools may be queried for nearby roads to determine and improve road network connectivity of the community.
---
## Links and resources
{%hackmd T31162aWSOqhxUMmO-G-ZQ %}