Severin HOHENSINNER / Bernhard LAGER (University of Natural Resources & Life Sciences, Vienna, Austria)   Outline: identification of natural and human modifications of the Danube river landscape nearby/within a growing urban agglomeration; reconstruction of river morphological changes and compilation of a GIS-database of historical river engineering measures Abstract: Currently, a research project aims to accomplish the first interdisciplinary environmental history of the Viennese Danube from 1500 A.D. till around 1900 (ENVIEDAN, FWF-No. P22265-G18, project leader: Verena Winiwarter). That includes the reconstruction of historical river engineering measures to better understand the human caused changes of the river landscape. A comprehensive review of historical records (maps, surveys and written sources) provides the basis for the compilation of a GIS-database. The first work step involves the reconstruction (using ArcGIS 10) of the Viennese river landscape for 8 points in time from around 1660 to 2010. In the next step, the 8 resulting GIS-maps are used as a geographical reference for the location of the historically documented river engineering measures. Until now, almost 350 hydraulic structures/measures have been identified. The written records prior to 1550 and the first maps up to the 1660s allow only a rough geographical location of human interventions. Younger maps and surveys also enable to quantify the dimensions of engineering measures. In the GIS-database, for each hydraulic structure/measure the year of construction, type, function, duration of its existence/functioning and citations of the historical records are added as object attributes. In addition, a second GIS-database for historically recorded Danube floods and thereby flood induced damages will be deployed. The databases will provide useful tools for the interdisciplinary discussion and integration of data from various scientific disciplines (environmental history, fluvial morphology, archaeology, geomorphology, …). Until now, first promising findings with respect to the history of river engineering and the evolution of the river landscape in Vienna underline the practical and scientific benefit of the work. Keywords: environmental history, river morphology, floodplain, river...

Sandra RIEKE (FIAK, Cottbus, Germany)   Outline: Combining different plans and the problems in correlating them. Abstract: Based on examples from Cherchel , the antique Caesarea Mauretaniae in North Africa and Großkrotzenburg, a Roman fort with associated vicus in the German State of Hesse, the possibilities and limitations offered by the digitalisation of historical plans will be discussed. Plans and drafts in the French military archive in Vincennes were used for a composite plan containing both the antique and modern Cherchel, as well as numerous excavation drawings to be found in the Centre Camille Jullian, Université d’Aix-en-Provence, where many original excavation plans of various French excavation teams have been digitalized. In addition aerial photos of excavations, antique engravings, published illustrations and modern town maps were used. All of this material was combined into a composite overall plan. Excavation plans from various excavation campaigns from the beginning of the 20th century up to today were used to compile an overall plan of Großkrotzenburg. Cadastral plans, town maps and published reconstructions were employed. A new cadastral plan of Roman Großkrotzenburg is planned for the near future, despite all the problems facing the correlation of such varied material. Despite careful rectification, an accurate fit was not always possible. In some cases dimensionally unstable photocopies of excavation drawings can shake the foundations of the whole reconstruction. How might one recognise these sources of error? How should they be treated? Should they be mentioned or silently interpolated? Keywords: Digitalisation, rectifying historical plans and combining...

Georg BREITNER / Christof SCHUPPERT (Generaldirektion Kulturelles Erbe Rheinland-Pfalz, Mainz/Trier, Germany)   Outline: We are working on making information from historical cartographic material available for the cultural heritage management by digitizing, rectifying and georeferencing. So these can be used in a GIS for the layering with current spatial data such as topographic maps, aerial photographs and LIDAR-based digital terrain models. Abstract: Since 2010 historical maps and plans are processed for the use in a geographic information system at the Generaldirektion Kulturelles Erbe Rheinland-Pfalz, as this kind of historical sources contains much spatial information about past states of cultural monuments or past landscape conditions. The most significant project of this kind is the GIS-based processing and mapping of urban archaeological plans in Trier recorded since 1870. This involves the digitization, rectifying and georeferencing of almost 2.000 plans and numerous handwritten archaeological sketches that provide a broad basis for the comprehensive mapping of Roman and medieval finds in the urban area of Trier. Thereby the Roman road network which to date was predominantly based on theoretical models can be reconstructed in detail for the first time using georeferenced archaeological plans of the past 140 years. In a further step the Roman city plan will be examined on its development from the 1st to the 4th century A.D. Further projects using rectified and georeferenced historical maps aim to the reconstruction of historic town centers, garden structures and abbeys. In the GIS-based analysis of historical maps high-resolution digital terrain models created by using laser technology (LIDAR) play an increasingly important role. On the one hand, these are useful for georeferencing historical maps because they include control points that are often missing on modern maps respectively are not visible on aerial photographs. At the same time georeferenced historical maps offer the possibility to classify and date yet unknown landscape elements that are captured in the terrain model. During the session, the methodical approach used for processing historical maps in GIS shall be presented as well as the results of the projects and ways of presentation (e. g. WebGIS). Keywords: Historical maps, Georeferencing, GIS,...

David BIBBY (Regierungspräsidium Stuttgart/Landesamt für Denkmalpfelge Baden-Württemberg, Germany)   Abstract: This contribution introduces a slightly older project which, however, has triple relevance for this year’s conference – in terms of the overarching theme of urban archaeology, for pre-excavation strategies and, in the technical execution of the project, especially for the session “Georeferencing historical maps”. In 2002 in Petershausen quarter of Konstanz South West Germany planning permission was granted for a large new communal administrative building within the area once occupied by ancillary buildings of the Benedictine Abbey Petershausen, founded 992.  An excavation was planned and in preparation, historical plan material was examined. Exceptional in this respect is the plan of Petershausen by the then “Master of City Buildings” (Stadtbaumeister) in Konstanz the Austrian architect Peter Nenning. The survey was carried out and the plan drawn at time of the Napoleonic secularisation, as part of an inventory to accompany the transition of the buildings from the Benedictine order to the Grand Duchy of Baden. Then plan shows a collection of buildings varying in date from medieval to the late barock. In the south-western area of the plan, where the excavation was planned, long disappeared buildings are shown.  The question arose as to whether the plan is a useful and accurate historical source? Could it help us as a non-intrusive prospection tool in the forefront of the excavation and provide us preemptively with important details allowing a more targeted Excavation? This contribution attempts to answer these questions. Using a combination of standard CAD and rectification software Nennings plan was georeferenced according to today’s topography – a task which turned out to be much more difficult than originally expected. A whole series of other later historical maps had to be found to bridge the gap as “stepping stones into the past” and were integrated into the project. A project which turned into a fascinating discourse between the ordered world view of a late Rococo/early Biedermeier architect and today’s real, considerably less rectangular topography. And with the dig that followed it was possible to test the method as a soft prospection method against the actual excavation results. Keywords: georeferencing, prospection, pre-excavation, historical...

Organisers: Ann DEGRAEVE, Belgium | David BIBBY, Germany In recent years, the digitization of movable heritage has resulted in a growing interest in historical cartographic material with its wealth of information. Historical maps hold basic information often not accessible in other visual or written sources such as place-names, parcels and buildings long since disappeared. Rectification and georeferencing these maps, layering them with other spatial data and taking into account not only the mapping of space but also the historical information and cartographic science and mind sets – both historical and contemporary – create thus a content rich visual overlay bringing us to a new level of understanding. This session aims at the presentation of the current state of research with examples of the numerous possible applications, and at answering the following questions: Why do we want to georeference historical maps? What is involved in the georeferencing process? Which tools and technologies are used for rectification and georeferencing (software, webtools …)? What is the theoretical and methodological approach? How can we use the results? Themes might include integration of historic geographical data into current georeferenced frameworks, creation of digital on-line libraries, virtual historic landscapes, animations, georeferenced maps as a virtual prospection tools etc. as well as how georeferencing ancient maps relates to archaeological practice especially in an urban...

WORKSHOPS Georeferencing historical maps Organisers | A. Degraeve, Belgium | D. Bibby, German David BIBBY, Germany: More or less 90°: Georeferencing Peter Nenning’s Plan of the Benedictine Abbey of Petershausen, Konstanz, South West Germany Georg BREITNER / Christof SCHUPPERT, Germany: Integration of historical cartographic material in geographic information systems at the  Generaldirektion Kulturelles Erbe Rheinland-Pfalz / Germany Sandra RIEKE, Germany: Digitalising and rectifying historical plans of Cherchel and Großkrotzenberg Severin HOHENSINNER / Bernhard LAGER, Austria: GIS-based reconstruction of historical river engineering measures at the Viennese Danube River since the 13th century Hans BLANCHAERT, Belgium: Localization of the French line of defense between Ypres and Comines (Belgium): an archeological and geographical contribution. Menne C. KOSIAN, The Netherlands: Now you see it, now you don’t Jamie McLAUGHLIN, United Kingdom: RESTful Mapping: Web GIS & Eighteenth Century London Peter RAUXLOH, United Kingdom: Locating London – GIS Generated Research Resources Streets and Squares in Central European Towns – Work in Progress Organiser | M. Mosser / P. Mitchell, Austria Introduction Dölf WILD, Switzerland: Machen Plätze Sinn? “Raum und Öffentlichkeit” am Beispiel des mittelalterlichen Zürich Jürgen TRUMM, Switzerland: Vindonissa – streets and places inside and outside a legionary fortress Alfred SCHÄFER, Germany: The early road system of Roman Cologne Christian GUGL, Austria: Platzanlagen in römischen Lagervorstädten (canabae legionis) Martin MOSSER, Austria: Zentrum und Peripherie: zwei Straßenbefunde aus Vindobona Discussion Surveying | Theseus-Temple, Volksgarten Organisers | W. Beex | B. Ridderhof, The Netherlands |Giorgio VERDIANI, Italy iSpace for Archaeology from Nikon Metrology Organiser | G. Avern, Nikon SESSIONS Prospection and Remote Sensing – Advanced Methods For Archaeology Chair | A. Posluschny, Germany Apostolos SARRIS / Nikos PAPADOPOULOS, Greece: Geophysical Surveying in Urban Centers of Greece0 G. LEUCCI / G. di GIACOMO / G. SCARDOZZI, Italy: Archaeological surveys and geophysical prospecting for the reconstruction of the Messapian city walls in Ugento (Lecce) Michael DONEUS / Christian GUGL / Geert VERHOEVEN, Austria: Archaeological Airborne Remote Sensing in Roman Carnuntum S. Sirri SEREN / Sabine LADSTÄTTER, Austria: Archaeological Prospection by Using Geophysical Methods at Different Field Conditions and Archaeological Structures in Ephesos/Turkey Frank VERMEULEN, Belgium / Cristina CORSI, Italy / Michael KLEIN, Austria / Guenther WEINLINGER, Austria: The...