Alle Karten wurden in voller Auflösung nach Apple Aperture importiert. Hier ein Screenshot des Thumbnail-Views und danach ein PDF mit allen Karten – chronologisch sortiert – als Kontaktbogen.
gerhardkuehne: jetzt fehlen nur noch historische Fotos mit Location ;) Super Idee!
Features
Vergleich zwischen Karte heute, damals und Satellit
Harmonisches Farbschema der google Karte mit Betonung der Bahnstrecken.
Transparenz einstellbar über Radio Control
manuelle Korrektur der Karte, so dass sie auf die Topografie von heute passt
manuelle Korrektur der Karte bzgl. des Offset der Farben rot und braun – select color, copy layer, offset & blending mode:Darken
Cons
Ladezeit: ca. 15 Sekunden, bis die Karte von 1905 geladen ist. (6MB) – da die Scan-Aufösung allerding viel höher ist, als die Qualität der Karte, sollte man die Dateigröße ohne Verlust noch reduzieren können.
Hamburg und Altona 1803
Altona [PPN612024857]
Hamburg [PPN611207990]
Notizen
Auf der Altonaer Karte ist Altona um 6° auf heutige GeoKoordinaten zu korrigieren.
Auf der selben Karte ist St. Pauli im -4° zu drehen.
Die HHer Karte muss um -1° gedreht werden. Außerdem ist die Scan-Auflösung im Vergleich zu Altona kleiner -> Scale up 148%
MarineLives: Very nice - how about the ability for the user to add pop up data attached to the coordinates & to include a link - see dummy image?
MarineLives: (1) (Dreaming) of functionality u prob need user defined layers & ability to publish them to a Chrono common layer
(2) That way user can look at his/her specific annotations, and can work collaboartively on user oriented maps with public/academics
(3) But also have option to merge user specific map with other maps or with a Ur-Chrono-Map, with chrono map able to limit view of..
(4)..annotations to specific century (if wish) - like your slide/button choice on year of map in top LH corner of map
Chronoscope Hamburg v2.x
Zwischen Jan und März 2017 wurde google maps durch Mapbox GL ersetzt. Außerdem wurden alle Karten neu rektifiziert und eine Karte von 1590, 1657 und 1937 neu hinzugefügt. cf.
set the control points – focus on churches, bridges, street axes, …
save control points for later updates
open the georectified tiff – rotate no "normal" rectangular orientation – crop – add copyright – reduce to 4096 – save a jpg of reasonable filesize/quality (2MB)
add map to Chronoscope – guess and measure corner points with QGIS and the Chrono Cursor of the Chronoscope. – update corner points – iterate until the map aligns with mapbox.
GeoJSON Info Layer
Chronoscope 2.5 (Mar 2018) can import and display geo point sets on the historical maps. It is used to display
semantic icon info not (yet) mirgrated and unsed at Chronoscope v2.5
all links redirect through goolge
Hamburg Residents info was encoded in JavaScript in Chronoscope v1.2. The data consists of streets (geo location and orientation) and a set of residents associated to the streets. A JS algorithm was used to spread several residents along a street.
Chronoscope v1.5a can export the data to (almost) GeoJSON format by dumping the code into the console window. Further adjustments of the locations were necesarry to match the info with the map of 1657 >> Chronoscope 2.5 w/ Hamburg Residents of 1657
TODOs
BUG chrome does not load the maps at all
BUG fb cannot disply comma correctly – it is decoded by %2C instead
Chrono Marker not always on top of all maps
self geolocation should set the chrono cursor – how to catch the event?
correction of distortion (rectification) based on customizable control point
preview on inline OSM
KML export displays maps in Google Earth
Issues
JPEG2000 not supported.
The TIFF-Export is blueish
The export seems to be distorted and cannot be used as such on top of OSM or google maps.
Hannes says: This is a proper format for GIS like e.g. QGIS
Tim Waters – developer of QGIS – says: Generally, the GeoTiffs are in EPSG:4326 (lat/lon) like what you would see in Google Earth - but Google maps and OpenStreetMap are in spherical mercator (e.g.) EPSG:900913 (metres)
The resolution is half the quality of the original StabiHH scans. Due to upload or due to Map Warper?? Maybe due to low-res uploads
WorldMap WARP – yet another instance of Map Warper. Differences to Map Warper:
Base Layer can be changed to Google Street, Google Satellite, Google Hybrid
export of original map file
MapTiler
MapTiler 7 is a commercial tool to tile maps, which can be used as tiled layers on top of google maps or OSM. The free version creates tiles with ''MapTiler' watermarks.
Chronoscope Hamburg/World 2.6 contains all map data of ChronoAtlas and displays maps world wide.
19.3.18
Chronoscope 2.5 :: migration from mapbox 0.32 to 0.39, migration of ChronoCursor from Chronoscope 1, scale control, slider control for transparency, GeoJSON info layer for residents 1650 and Dransfeld photography