Virtual Map Forum 2.0 - Using FOSS4G in Historic Map Collections

Sächsische Landesbibliothek – Staats- und Universitätsbibliothek Dresden slub-dresden.de© by SLUB Dresden

Using FOSS4G in historic map collections

July 16, 2014

The virtual map forum 2.0 (VK2.0)


1. Starting Point

Jacob Mendt @arwesley27 | Abteilung Informationstechnologie

http://www.slub-dresden.de/sammlungen/karten


1. Libraries and Spatial Information

16. Juli 2014 | Seite 3 Jacob Mendt @arwesley27 | Abteilung Informationstechnologie

I. No spatial searching

possibilities.

II.No extracting of the spatial

information of the maps.

Who needs more than a thematic map search?


1. The goals of the project


Portal for spatialtemporal Searching and Visualization

Data Infrastructure for Historic Maps

Tools for georeferencing our

Historic Map Collections


2. Spatial Data Infrastructure



2. Georeferencing


Extracting of ground control

points and a clip polygon

Calculate the transformation parameter and clipping of the

results

Validation

Community based Georeferencing and

automatic detection of map corners


2. Community based Georeferencing


- Implementation based on Pyramid-Webframework,

OL3 and GDAL

- In first Tests 2.500 of 6.000 Plane Survey Sheets

could be georeferenced.

Demo:

http://kartenforum.slub-dresden.de/

vkviewer/?welcomepage=off




1. Problem: How to ensure the quality of the data

- Statistical analyses of the results of different

transformation algorithms and presentation as traffic

light system to the user

- Admin view for double checking new georeference

results

- Opportunities for users to update and improve existing

georeferencing results




2. Problem: Georeferencing Performance

- Persistent Georeferencing

- Use GeoTIFF

- Bottleneck is the updating of the data backend

- Community based Georeferencing

- Bottleneck is the disk I/O

- Use GDAL VRT

- Clip unnecessary edge content on the client side


2. Automatic detection of edge corners


- Only for the Plane Survey Sheets

- Uses the Image Processing Software Halcon

- Workflow:

1.) Detect edge area

2.) Use inline filter

3.) Match Coordinates




1. Problem: Different map sizes




2. Problem: Variety of edge design


3. What comes next


- Better validation tools for the georeference process

- Expand the georeference tools to further historic map

types

- Couple Historic Maps SDI with other SDI (GDI-DE)

- Spatialtemporal Searches for all library objects with a

spatial dimension (maps, pictures, diaries, newspaper

articles, ...)

- More tools:

- Dynamic visualiziation of timeseries

- Annotation tools for historic maps (LinkedData)

- ...

Sächsische Landesbibliothek – Staats- und Universitätsbibliothek Dresden slub-dresden.de© by SLUB Dresden16. Juli 2014 | Seite 17

Jacob Mendt @arwesley27 | Abteilung Informationstechnologie

Thank you for your attention

kartenforum.slub-dresden.de

[email protected](Twitter: @arwesley27)

http://kartenforum.slub-dresden.de/

mailto:[email protected]

Virtual Map Forum 2.0 - Using FOSS4G in Historic Map Collections

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Transcript of Virtual Map Forum 2.0 - Using FOSS4G in Historic Map Collections