the nasca project a german-czech cooperationcrichter/christiane/pdf/pavelka_hanz… · msc (gis)...

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The Nasca Project A German-Czech Cooperation University of Applied Sciences Dresden Faculty of Spatial Information Prof. Dr.-Ing. Bernd Teichert MSc (GIS) Christiane Richter Czech Technical University in Prague Faculty of Civil Engineering Prof. Dr.-Ing. Karel Pavelka Dipl.-Ing. Karolina Hanzalova In 1995 a research project about the “Nasca Lines” in southern Peru was started at the University of Applied Sciences in Dresden/Germany. One of the major objectives of this project is the digital conservation of this famous World Cultural Heritage at the Pampa of Nasca and Palpa. In 2003 the Czech Technical University of Prague joined the Nasca project and since that time a very successful cooperation exists. This poster shows the main objectives in the fields of photogrammetry, surveying and remote sensing and some of the results. NascaGIS and NascaWebGIS With the availability of high and very high resolution sat- ellite images the possibilities of data capture became more efficient and economic. Between 2004 and 2011 several scenes of the satellites Ikonos, QuickBird, GeoEye-1 and WorldView-2 were bought by both institutions (Fig 6). Remote sensing During the fieldwork in 2008 and 2010 many pictures had been taken from both churches. A 3D-Animation was created with the software PhotoModeler. The church of San José was modelized with Google Sketchup (Fig. 7) and can be seen in Google Earth (Lat.: -14.607°, Long.: -75.128°). The photogrammetric approach is one of the most practi- cal solutions to capture vector data. 179 aerial photos, covering the main area of the Pampa of Nasca, are the basis of the photogrammetric survey (Fig. 1). In addition to these photogrammetric data a lot of photos were made during touristic flights. Out of these photos sev- eral mosaics with a high resolution were computed (Fig. 2) Fig. 7: The church of San Jose in Google Earth Surveying Photogrammetry 3D-Animations Satellite and Orthophoto maps Fig. 3: Rectification and digitalization of the Petroglyphs Fig. 8: NascaWebGIS Fig. 6: Satellite data and Ground Control Points (GCP’S) Fig. 5: Measurement of Ground Control Points with GPS 2004 2008 2010 The very first step was the determination of a precise basic network in the main Pampa of Nasca and Palpa. During the GPS campaigns in 2004, 2008 and 2010 (Fig. 5) about 400 GCP’s spread over an area of 60 km x 60 km had been measured. Another important photogrammetric task is the documen- tation of petroglyphs which can be found in different places (Fig. 3). Besides of these main objectives some archaeological sites like churches and temples were measured with photo- grammetric methods. Fig. 10: Satellite map When the Jesuits arrived in 1568 in Peru they con- structed churches and missions throughout the southern coastal region of Peru. Some of the most outstanding ex- amples of baroque architecture are the surviving façades of the two churches of San José and San Javier. Severe earth- quakes have left the churches in ruins. Rectified satellite images and orthophoto maps are used for the vector data capture at the Pampa of Nasca and Palpa with a reasonable accuracy. All the data (geometric and attributive data, pictures, animations etc.) are stored in the NascaGIS, which is based on the software Autodesk Topobase with Oracle Spa- tial. In order to provide the posterity an easy digital access to this famous cultural heritage, user friendly Internet applica- tions (NascaWebGIS) were developed. The applications were built with Open Source software products like Map- Guide, UMN MapServer, Mapbender and PostgreSQL/ PostGIS. An example is shown in Fig. 8. For further infor- mation see: www2.htw-dresden.de/nazca. Another important task consists in the production of or- thophoto and satellite maps of the entire region of Nasca and Palpa (e. g. Fig. 9 and 10). Fig. 4: The Pampa of Nasca and Palpa One of the most important tasks was the determination of Ground Control Points (GCP’s) as a basis for the rectifi- cation of the aerial photos and the satellite images. The most practical and efficient solution to determine these GCP’s in this huge area (see Fig. 4) is the GPS method. Fig. 1: Aerial photo mosaic Fig. 2: Photo mosaic All these satellite scenes were rectified by using the GCP’s and Digital Terrain Models. The orthorectification with SRTM-1 (X-Band) as well as with SRTM-3 (C-Band) has brought very good results in the plain of the Pampa of Nasca, where sub-pixel accuracy was achieved. The satellite image mosaic is now the basis for the vector data capture in the regions where no photogrammetric data are available. Fig. 9: Orthophoto map

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Page 1: The Nasca Project A German-Czech Cooperationcrichter/Christiane/pdf/Pavelka_Hanz… · MSc (GIS) Christiane Richter Czech Technical University in Prague Faculty of Civil Engineering

The Nasca ProjectA German-Czech Cooperation

University of Applied Sciences DresdenFaculty of Spatial InformationProf. Dr.-Ing. Bernd TeichertMSc (GIS) Christiane Richter

Czech Technical University in Prague Faculty of Civil Engineering Prof. Dr.-Ing. Karel Pavelka

Dipl.-Ing. Karolina Hanzalova

In 1995 a research project about the “Nasca Lines” in southern Peru was started at the University of Applied Sciences in Dresden/Germany. One of the major objectives of this project is the digital conservation of this famous World Cultural Heritage at the Pampa of Nasca and Palpa. In 2003 the Czech Technical University of Prague joined the Nasca project and since that time a very successful cooperation exists. This poster shows the main objectives in the fields of photogrammetry, surveying and remote sensing and some of the results.

NascaGIS and NascaWebGIS

With the availability of high and very high resolution sat-ellite images the possibilities of data capture became more efficient and economic. Between 2004 and 2011 several scenes of the satellites Ikonos, QuickBird, GeoEye-1 and WorldView-2 were bought by both institutions (Fig 6).

Remote sensing

During the fieldwork in 2008 and 2010 many pictures had been taken from both churches. A 3D-Animation was created with the software PhotoModeler. The church of San José was modelized with Google Sketchup (Fig. 7) and can be seen in Google Earth (Lat.: -14.607°, Long.: -75.128°).

The photogrammetric approach is one of the most practi-cal solutions to capture vector data. 179 aerial photos, covering the main area of the Pampa of Nasca, are the basis of the photogrammetric survey (Fig. 1).

In addition to these photogrammetric data a lot of photos were made during touristic flights. Out of these photos sev-eral mosaics with a high resolution were computed (Fig. 2)

Fig. 7: The church of San Jose in Google Earth

SurveyingPhotogrammetry

3D-Animations Satellite and Orthophoto maps

Fig. 3: Rectification and digitalization of the Petroglyphs

Fig. 8: NascaWebGIS

Fig. 6: Satellite data and Ground Control Points (GCP’S)

Fig. 5: Measurement of Ground Control Points with GPS

20042008

2010

The very first step was the determination of a precise basic network in the main Pampa of Nasca and Palpa. During the GPS campaigns in 2004, 2008 and 2010 (Fig. 5) about 400 GCP’s spread over an area of 60 km x 60 km had been measured.

Another important photogrammetric task is the documen-tation of petroglyphs which can be found in different places (Fig. 3).

Besides of these main objectives some archaeological sites like churches and temples were measured with photo-grammetric methods.

Fig. 10: Satellite map

When the Jesuits arrived in 1568 in Peru they con-structed churches and missions throughout the southern coastal region of Peru. Some of the most outstanding ex-amples of baroque architecture are the surviving façades of the two churches of San José and San Javier. Severe earth-quakes have left the churches in ruins.

Rectified satellite images and orthophoto maps are used for the vector data capture at the Pampa of Nasca and Palpa with a reasonable accuracy.

All the data (geometric and attributive data, pictures, animations etc.) are stored in the NascaGIS, which is based on the software Autodesk Topobase with Oracle Spa-tial.

In order to provide the posterity an easy digital access to this famous cultural heritage, user friendly Internet applica-tions (NascaWebGIS) were developed. The applications were built with Open Source software products like Map-Guide, UMN MapServer, Mapbender and PostgreSQL/ PostGIS. An example is shown in Fig. 8. For further infor-mation see: www2.htw-dresden.de/nazca.

Another important task consists in the production of or-thophoto and satellite maps of the entire region of Nasca and Palpa (e. g. Fig. 9 and 10).

Fig. 4: The Pampa of Nasca and Palpa

One of the most important tasks was the determination of Ground Control Points (GCP’s) as a basis for the rectifi-cation of the aerial photos and the satellite images. The most practical and efficient solution to determine these GCP’s in this huge area (see Fig. 4) is the GPS method.

Fig. 1: Aerial photo mosaic Fig. 2: Photo mosaic

All these satellite scenes were rectified by using the GCP’s and Digital Terrain Models. The orthorectification with SRTM-1 (X-Band) as well as with SRTM-3 (C-Band) has brought very good results in the plain of the Pampa of Nasca, where sub-pixel accuracy was achieved.

The satellite image mosaic is now the basis for the vector data capture in the regions where no photogrammetric data are available.

Fig. 9: Orthophoto map