The growing use of geographic information systems (GIS) and geographical analyses in different areasof the digital humanities highlights the need for geocoding, i.e. assigning geographic coordinates torecords in a dataset. Such... more
The growing use of geographic information systems (GIS) and geographical analyses in different areasof the digital humanities highlights the need for geocoding, i.e. assigning geographic coordinates torecords in a dataset. Such spatially-referenced datasets are a precondition for any spatial analysis andvisualization. While GIS in general is a dynamically evolving branch of software development, thereis a need for specialized applications which would assist researchers in geocoding datasets in history,archaeology, and the digital humanities. Therefore, we developed the ‘‘Historical Geocoding Assistant’’,an open-source web tool that meets the specific needs of historical research and brings a solution togeocoding historical data in a convenient, fast, and reliable way.
The Geoinformatics inherited an ancient sexagesimal system for geographic position from Babylon civilization aged more than 4000 years based on degrees, minutes, and seconds. This paper proposes a new modern metric system based on minutes... more
The Geoinformatics inherited an ancient sexagesimal system for geographic position from Babylon civilization aged more than 4000 years based on degrees, minutes, and seconds. This paper proposes a new modern metric system based on minutes to represent the geographic coordinates in a simple quantity and accepted accuracy for navigation purposes to be used in mobile GIS.
The necessity of Stereo 70 topographical surveys for archaeological sites raises the issue of access to coordinates needed to create a proper measurement aligned to the Romanian national system. In most situations involving our team,... more
The necessity of Stereo 70 topographical surveys for archaeological sites raises the issue of access to coordinates needed to create a proper measurement aligned to the Romanian national system. In most situations involving our team, Stereo 70 coordinates of sites that had to be measured were unknown or the site itself was still unknown, being unidentified yet, and thereby we were forced to use local coordinates for those particular surveys. Local coordinates involve an orientation issue, orientation mainly achieved with the help of a compass to indicate the magnetic North, thus implying another issue: the difference between true (geographic) North and magnetic North. In our experience the difference between our survey and the reality was between 7 and 12 trigonometric degrees. The software methods used rotations based on the shapefiles thus leaving the source coordinates unaltered, but these created inconveniences because both shapefiles and source coordinates, among other digital data, must be handed over to the Ministry of Culture and Cults in order to obtain the excavation authorization. Also, the archaeologists who requested the surveys need geographically correct data. This trigonometric method involves trigonometric correction of the raw data acquired by the total station and its conversion to Stereo 70, thus offering precise data and surveys to researchers and institutions.
This study was an effort to calculate geographic coordinates, solar horizontal and equatorial coo-ridnates, direction of Qibla, sizes of Earth and Sun through gnomon (a vertical stick casting shadow). Gnomon has been used in history for... more
This study was an effort to calculate geographic coordinates, solar horizontal and equatorial coo-ridnates, direction of Qibla, sizes of Earth and Sun through gnomon (a vertical stick casting shadow). Gnomon has been used in history for remote navigations, astronomical and geodetic measurements. Geographic coordinates were found out with accuracy of less than 0.19 decimal degree from gnomon. Sun's horizontal and equatorial coordinates were calculated and analyzed with US Navy Observatory and NOAA Earth System Research Laboratory. These coordinates were less than 0.01 decimal degree different from coordinates provided by US Navy and following same daily trend with time. Through spherical triangle, direction of Qibla was found out. And it came out less than 0.18 decimal degree different from its value, used in Lahore. Radius of the earth measured from gnomon using concepts of Al Buruni was 1.45 km different from its true value. Using geometrical technique of similar and concurrent triangles, size of the sun was calculated and it was 1,651,088.776 km. Investigation of systematic and random errors in each calculation was the part of this research.
...Georeferensi sendiri adalah sebuah proses untuk memberikan/mendaftarkan informasi koordinat dan proyeksi pada peta cetak/raster. Tanpa acuan koordinat dan sistem proyeksi, peta cetak/raster ketika diinputkan ke dalam aplikasi GIS,... more
...Georeferensi sendiri adalah sebuah proses untuk memberikan/mendaftarkan informasi koordinat dan proyeksi pada peta cetak/raster. Tanpa acuan koordinat dan sistem proyeksi, peta cetak/raster ketika diinputkan ke dalam aplikasi GIS, lokasinya akan salah. Proses georeferensi peta cetak/raster dapat dilakukan dengan syarat peta tersebut memiliki informasi koordinat di tepinya (grid-grid koordinat)...
Georeference is a process for registering coordinate information and projections on scanned/raster maps. The map georeference process can be done by using software such as ArcMap or QGIS. However, this video specifically will only explain... more
Georeference is a process for registering coordinate information and projections on scanned/raster maps. The map georeference process can be done by using software such as ArcMap or QGIS. However, this video specifically will only explain the tutorial using the QGIS application.
Abstract Exploring urban landscapes off the beaten paths and collecting ignored places to share these impressions via the World Wide Web. This is what 'NSEW – Urban Explorations along the Matrix' is about. The project NSEW... more
Abstract Exploring urban landscapes off the beaten paths and collecting ignored places to share these impressions via the World Wide Web. This is what 'NSEW – Urban Explorations along the Matrix' is about. The project NSEW (North–South–East–West), founded by Austrian artist Evamaria Trischak in 2004, uses global positioning system (GPS) devices to locate the exact minute intercept points of the geographical coordinate system (i.e. the 'matrix') within urban agglomerations. Once a place on the GPS grid was visited, the documented perceptions of the exploration are shared by uploading the captured results (i.e. photos and stories) onto the NSEW website. The technique applied on these urban expeditions – the dérive, or drift – refers to the psychogeographic experiments of the situationists. The NSEW approach and method was entirely approved within the Vienna based project 4816 – referring to the geographic coordinates of Vienna (N48° and E16°). But how does the concept work out when applied to other cities? This article reveals the similarities and differences of traversing such different cities as Vienna, New York, Paris, Tel Aviv, Barcelona, Dortmund, Sao Paulo, Rio de Janeiro, Los Angeles and Frankfurt using the NSEW method.
