TITLE:
Street Mapping of Ife Metropolis, Osun State, Nigeria
AUTHORS:
Idowu Sunday Kolawole, Taofik Abayomi Alaga, Samson Akintunde Ogunyemi, Oladimeji Samuel Popoola, Mustapha Olayemi Oloko-Oba
KEYWORDS:
Remote Sensing, Geographic Information System, Aerial Photograph, Digitization
JOURNAL NAME:
Journal of Geographic Information System,
Vol.8 No.3,
June
17,
2016
ABSTRACT: The importance of
Remote Sensing and Geographic Information System in map making cannot be
overemphasized because of its ability to integrate spatial data with
non-spatial data and also communicate the resulting information in a way that
everyone would understand. Several works have taken advantage of the abilities
of these technologies to produce street maps using High Resolution Images. The
increase in development in Ile Ife, Osun State, Nigeria, has brought about navigation
challenge and associated difficulties. This work intends to produce a street
map that will ease navigation within the study area and help in road network
analysis, site suitability analysis etc. Aerial Photographs, captured in the
year 2009 and GeoEye1 Satellite Image of 2011 were used to extract the road
network of Ife Metropolis. The image was imported into ArcGIS environment, where
the database was created having feature datasets such as roads and special
features. To have all the elements in vector format, the image was digitized.
The street names collected from the field work was inputted into the database
and then subjected to cartographical processes. 512 Roads were captured within
four classes of Road Network namely Express road (5), Secondary Road (25),
Primary Roads (22) and Street Road (460). This field work revealed that a
larger percentage of the roads were not paved, while most of the paved ones
have deteriorated and the newly constructed ones were not documented. It also
showed that some of the roads were not named according to the standard and some
were not named at all. From this study, we recommend that the naming system
should be standardized across the study area. It is also recommended that
provision should be made for street map revision on a yearly basis so as to
account for changes.