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geoinfo:topics:vetera:start [2018/12/04 23:04] – [2) Georeference Maps and Images to Locate Vetera I] admingeoinfo:topics:vetera:start [2020/12/03 23:21] (current) – [Useful Files and Links] rolf
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 |  **Roman Settlements in Modern Xanten Area**  | |  **Roman Settlements in Modern Xanten Area**  |
 |  {{http://intarch.ac.uk/journal/issue17/4/images/fig12.jpg?400}}  | |  {{http://intarch.ac.uk/journal/issue17/4/images/fig12.jpg?400}}  |
-| Medieval Xanten, Colonia Ulpia Traiania and Vetera I (by P. A. Faulkner). \\ Source: http://intarch.ac.uk/journal/issue17/4/4.html |+| Fig. 1.1: Medieval Xanten, Colonia Ulpia Traiania and Vetera I (by P. A. Faulkner). \\ Source: http://intarch.ac.uk/journal/issue17/4/4.html |
  
 |  **Castra Vetera I and Colonia Ulpia Traiana**  || |  **Castra Vetera I and Colonia Ulpia Traiana**  ||
-|  {{http://www.zeitreise-ruhr.de/chronik/gfx/cut_cp.jpg}}  |  {{http://www.zeitreise-ruhr.de/chronik/gfx/legionslager_vetera_castra_I_ap.jpg}}  | +|  {{:geoinfo:topics:vetera:cut_cp.jpg}}  |  {{:geoinfo:topics:vetera:legionslager_vetera_castra_I_ap.jpg}}  | 
-| Colonia Ulpia Traiana (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]). \\ Source: http://www.zeitreise-ruhr.de/chronik/060-roemerundgermanen.html  | Castra Vetera I (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]). \\ Source: http://www.zeitreise-ruhr.de/chronik/060-roemerundgermanen.html | +| Fig. 2.1: Colonia Ulpia Traiana (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]). \\ Source: http://www.zeitreise-ruhr.de/chronik/060-roemerundgermanen.html  | Fig. 2.2: Castra Vetera I (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]). \\ Source: http://www.zeitreise-ruhr.de/chronik/060-roemerundgermanen.html | 
-|  {{ :geoinfo:topics:vetera:g.jpg }}  |  {{ :geoinfo:topics:vetera:a.jpg}}  | +|  {{:geoinfo:topics:vetera:g.jpg }}  |  {{:geoinfo:topics:vetera:a.jpg}}  | 
-| Vetera I, secured ground plan (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]) | Vetera I, reconstruction (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]) |    +| Fig. 2.3: Vetera I, secured ground plan (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]) | Fig. 2.4: Vetera I, reconstruction (by [[http://www.informationsmedien.com/|Dießenbacher Informationsmedien]]) |    
-|  {{http://intarch.ac.uk/journal/issue17/4/images/fig13.jpg}}  |  {{ :geoinfo:topics:vetera:15338bd31ed.jpg |}}  | +|  {{http://intarch.ac.uk/journal/issue17/4/images/fig13.jpg}}  |  {{:geoinfo:topics:vetera:15338bd31ed.jpg}}  | 
-| Vetera I, Neronian fort, showing building numbers, kilns and fortifications of earlier forts (by P. A. Faulkner). \\ Source and Legend: http://intarch.ac.uk/journal/issue17/4/4.html | Source: http://www.roemisches-rheinland.com/Wissen/Festes-Lager |+| Fig. 2.5: Vetera I, Neronian fort, showing building numbers, kilns and fortifications of earlier forts (by P. A. Faulkner). \\ Source and Legend: http://intarch.ac.uk/journal/issue17/4/4.html | Fig. 2.6: Source: http://www.roemisches-rheinland.com/Wissen/Festes-Lager |
  
  
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 === Subtask 1 === === Subtask 1 ===
  
-Import the Web Mapping Services WMS of NRW to QGIS and use the official topograhic maps therein as a reference for the following tasks.+Import the Web Mapping Services WMS of NRW into QGIS and use the official topograhic maps (TK... and Grundkarte) therein as a reference for the following tasks. To do so follow the instructions at [[geoinfo:topics:Open Data NRW:start]].
  
 +=== Subtask 2 ===
  
-[[geoinfo:topics:Open Data NRW:start]]+Use the georeference tool **georeferencer** to align the photographed map above with a current digital topographic map form open data NRW. Perform a non-linear transformation to georeference the map photo.
  
-=== Subtask 2 ===+To georeference (= transform, correct) the photo I have taken from the topographic map a "Linear Transformation" is not appropriate. The image is mainly rotated (a non-linear transformation) and (linearly) distorted by perspective. The photo has not been taken perfectly orthogonally to the map plane. The transformation "Thin Plate Spline" does a good job. I cannot explain for now what it exactly is. The screenshot below shows the satisfying result after the non-linear transformation to correct the image. The locally different transformation of the image (dependent on the location on the image) are obvious. I do not know yet how to handle the black background of the rotated image on the vertically aligned rectangular canvas.
  
-Use the georeference tool to align the photographed map above with a current digital topographic map form open data NRW.+{{:geoinfo:topics:vetera:georef_topo_screenshot_thin_plate_spline.jpg?direct}}
  
-Perform a non-linear transformation to georeference the map photo.+=== Subtask 3 ===
  
-To georeference (= transform, correct) the photo I have taken from the topographic map a "Linear Transformation" is not appropriate. The image is mainly rotated (a non-linear transformation) and (linearly) distorted by perspective. The photo has not been taken perfectly orthogonally to the map plane. The transformation "Thin Plate Spline" does a good job. I cannot explain for now what it exactly is. The screenshot below shows the satisfying result after the non-linear transformation to correct the image. The locally different transformation of the image (dependent on the location on the image) are obvious. I do not know yet how to handle the black background of the rotated image on the vertically aligned rectangular canvas.+Use the georeferenced topographic map from 1998 to georeference the Vetera I reconstruction by Dießenbacher shown in Fig. 2.4.  
 + 
 +Overlay these georeferenced maps / images on top of the DTM you created earlier (the geoTiff files generated from xyz). Is the reconstruction plausible?
  
-{{:geoinfo:topics:vetera:georef_topo_screenshot_thin_plate_spline.jpg}} 
  
  
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 | Fig. 1: The gate of the Neronian encampment. | Fig.2: “Streifenhäuser” along the east leading road. | Fig. 3: Traces of the eastern breastwork of the camp. | | Fig. 1: The gate of the Neronian encampment. | Fig.2: “Streifenhäuser” along the east leading road. | Fig. 3: Traces of the eastern breastwork of the camp. |
 |  Source:  Baoquan Song (Ruhr-Uni Bochum), Norbert Hanel (Uni Köln): \\ http://www.ruhr-uni-bochum.de/archaeologie/forschung/projekte/luftbildxanten.html.en  ||| |  Source:  Baoquan Song (Ruhr-Uni Bochum), Norbert Hanel (Uni Köln): \\ http://www.ruhr-uni-bochum.de/archaeologie/forschung/projekte/luftbildxanten.html.en  |||
 +
 +=== Subtask 1 ===
  
 Where are these features located on the Fürstenberg? Try to georeference them. Where are these features located on the Fürstenberg? Try to georeference them.
  
 +=== Subtask 2 ===
 +
 +Map them in the context of the georeferenced topographic map you created before and the georeferenced Castra Vetera I model by Dießenbacher. 
 +
 +How does the information fit together?
 +
 +
 +===== More on History =====
  
-===== Useful Files and Links  ===== 
  
-==== 1) Revolt of the Batavi ==== 
  
-https://en.wikipedia.org/wiki/Revolt_of_the_Batavi+  * [[https://en.wikipedia.org/wiki/Revolt_of_the_Batavi|Revolt of the Batavi]] (Wikipedia) 
 +  * [[http://www.zeitreise-ruhr.de/chronik/060-roemerundgermanen.html|Conquest of Germania esp. Lower Rhine Area]] (Zeitreise Ruhr)
  
  
geoinfo/topics/vetera/start.1543964686.txt.gz · Last modified: 2018/12/04 23:04 by admin