Informal Roads

Goals

This project aims to import informal roads primarily used by indigenous peoples in Irkutsk Oblast, Russia. Very little roads currently exist in OSM for this area.

Schedule

March 2024: Preparation of data and attempted discussions with OSM community in Russia.

June 2024: Preparation of import proposal in the wiki.

July 2024: Submission of import proposal to the imports@ list.

July 2024: Submission of import proposal to the talk-ru@ list

July 2024: Annotation in the Import Catalog.

July 2024: if no issues or concerns, Import will begin after the 2 week review period.

August 2024: Import end

Import Data

These data were created by students at the George Washington University to quantify informal road expansion and community impact as part of a community-engagement research project.

The data used for this import are Shapefiles that have been reprojected to WGS84.

Background

Data source site: No website available. Extract of the shapefile containing the informal roads can be found here.

Data license: https://website.tld/license

Type of license (if applicable): CC-PDDC

ODbL Compliance verified: yes

Import Type

This is a one-time import, will be prepared manually and uploaded via JOSM.

Data Preparation

Data Reduction & Simplification

All data that already exists in OSM was removed. The import will be prepared manually, so information that is already contained in OSM will not be uploaded redundantly.

Tagging Plans

Tagging plan is done in accordance with the tagging schema put forth by OSM.  Each highway classification in the import data will be mapped to an existing OSM highway tag.

Shapefile attribute	OSM Tag (highway=*)
city_road	residential
L-clearing	track
oil_gas	service
other/unknown	unclassified
subsistence	track
forestry	track

Changeset Tags

The following values will be used for each changeset created.

Key	Value
comment	Import of informal roads
import	yes
source	George Washington University, Oleg Sizov and Viktor Bogdanov
source:date	July 2024
import:page	https://wiki.openstreetmap.org/wiki/Informal_Roads
source:license	CC-PDDC

Data Transformation

JOSM tool Add nodes at intersections will be used to finish the data prep for import.

Data Transformation Results

Post a link to your OSM XML files.

Data Merge Workflow

Team Approach

Data preparation and import will be undertaken by experienced GIS data/OSM users from GWU using an import specific OSM user account (RAHinton_Import)

Workflow

• First, redundant road segments that already existed in OSM were removed from the dataset.
• Then the data were evaluated based on topological rules to correct for any issues such as self intersections or self overlaps. Many problematic line segments were identified using  topology rules in ArcGIS and through visual inspection. Student researchers edited and fixed the roads so that they adhered to topological rules and reflected what is seen in the imagery.
• To be compatible with the OSM platform, the data were reprojected/transformed to WGS84 from UTM Zone 48N, WGS84
• Due to the large file size, the data were next parsed into smaller datasets based on attributes for import. Using JOSM, each smaller dataset will be imported manually one at a time to reduce processing time and the management of conflicts.

Conflation

• All roads currently in OSM were removed from the data prior to import. This was done using a buffer in ArcGIS Pro along with manual removal of roads that lined up with existing roads in OSM.
• Any road that was partially in OSM already was split so that only line segments that were entirely new would be imported.
• Any issue flagged during import will be manually addressed in JOSM

QA

Manual QA by JOSM Validation tool.