CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
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Phase F Extraction of the orthometric attribute. In
particular, our research studies the automatic bundling
methods of the individual objects of the level extracted
automatically by GRID data obtained on a Arclnfo
environment, resulting from processing the DTM available
inside IT2000 Map.
Phase G: Region structuring
This level allow to structure Geographical Data and
relative Archives by HIERARCHICAL DESIGNED
georeferencing that include the 3 logical classes of objects:
Individual object, Components and Complexes.
In this level are described REGION based procedures.
Examination of case studies typical of the lists of objects
and flexible adaptation of the structuring procedures to their
characteristics (complex objects without elucidation of their
component objects, component objects without the complex
object, adjacent components, complex objects with relative
component objects, individual objects).
2.3 Georeferencing with GPS Pathfinder Pocket System
The research we propose, studied:
- implementation of the Risk map with object Coordinates (E,
N, q) acquired with the GPS Pathfinder Pocket System;
- methods for handling and processing the data;
- test of accuracy and processing protocols: this phase is
particularly delicate since the relatively low cost of the
instruments, the high manipulability, and ease in using the
system will encourage its wide spread use throughout the
sector; this could bring about the risk of superficial methods of
processing with uncontrollable errors, especially with the less
experienced user. Therefore, there is the need to disseminate
basic processing standards.
- real time connection methods, by means of experimentation
and targeted testing in zones having different morphologies
(mountainous, hilly, flat plains regions) for acquisition of the
differential correction with permanent GPS stations sprinkled
around the territory in order to improve the degree of accuracy
of the data acquired. Definition of connection protocols via
modem (radio and GSM) and the Internet; use of permanent
stations for realisation of Virtual Reference Stations (VRS);
definition of a Master Virtual Station 7 .
Useful of Palm GPS technology has been tested in both
direction:
- remote updating DBASE with the data collected on site
avoiding manual transcription error, eventually using Palm with
support cartography to make sketched digitalisation;
- georeferencing (G.) by acquiring directly 3D coordinates
position for particularly set of manufacts. Filed of possible
apply:
-archaeological sites, complex and components;
-archaeological routes, protected itineraries, open museums, ...
not registered on the map;
-generally in the cases where is possible GPS be positioned to
have signal coverage, over the objects, or inside (for
architectural manufact this condition is not verified, so it’s very
limited for historical centre) for set of well that needed to be G.
obviously in absence of map.
2.3 3D Environmental model to build 3D georeferencing and
topology : aggregating attribute to GEODATABASE
- Automatic processing and bundling the geographic data for
the Risk map of the Cultural Objects.
We will conduct experiments with the following objectives:
- methodologies, specifications and automation procedures for
extraction, bundling and integration-correlation of
environmental and geographic information on the individual
objects or complexes currently at risk;
- generation of inclination charts, solar exposition, acclivity
(information associated with the altimetric description of the
terrain), using GRID topological data structures of the 3D
model and area structures extracted by uniform bands, related
with the topology of the cultural objects, in an indexed and
attributed format for easy consultation;
- interrelationships with themes of other origins (geological,
subsoil, hydrographic, overflow, landslide risk, hydro-
geological instability....) to generate vulnerability indices and
parameters;
The idea is to improve on the idea of merely cataloguing and
classifying in order to better support the comparative work in
evaluating the phenomena of accelerated decay and instability,
in appraising the transformations taking place over time, in
making historical assessments of the data, and providing
support to the decision-making.
2.4 Experimentation: usability of Cadastral Map in
Georeferencing
The research intends to pursue experimentation in the direction
of using cadastral data, looking for context where the Map of
Risk may be used. In fact, inside Map of Risk, once any risk
level or index has been uncovered, tracing back the properties
will be a mandatory step. Two the settings of use are examined:
-1. BASIC georeferencing using numeric cadastral charts;
- II. ON LINE use at a later time of the cadastral sheets from
WEB GIS of the cultural objects.
Problems to face:
* geometric identification of the restricted area by means of
cross-referenced research of the Superintendent (list of the
protected cultural objects, protection decrees, ...), of the
Registry and cadastral office;
* check of the procedure of integration between cadastral
cartography - parcel - registry - “protected by law” heritage:
finding the protection Decree, identifying the parcel numbers
and respective certificates on line.
* evaluating if the use can be concretely forecasted in
differentiated times and, at a later time, with respect to an initial
generalised georeferencing on all the cultural objects and in this
case, according to which methods.
In case of protected monuments, only from the single decree is
possible to identify restricted area, in this case through number
of parcel; from the parcel to the cadastral map and to the
property registry.
And in case of all the other monuments, once extracted from
the risk area the “at risk well georeferencfed”, is possible from
the cadastral map, to find the parcel number till to the property
registry.
In the Italian case, digital Cadastral Maps are inhomogeneous,
partially updated. In Lombardy only 3 provinces (Milan, Lodi,
Cremona) provides vectorial map, for the other there are raster
map with geotiff file only around some extra urban areas. And
so on. So it’s impossible to make responsible of digitalisation
and georeferenciation of map (solving transformation problems,
algorithms, world file, ...) the operator of the G. of Cultural
Heritage. What is possible and has been done, but only in case
of expeditious and punctual G. with low cost necessities, is to
delegate to the Institute of Cadastre (Territorial Agency) the
work to identifying and georeferencing on he map but only by
the office without on site campaign and collection of database
field. One great problem experimented is the difficulty to locate
monuments on the map without on site campaigns, since
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