This paper describes a Web-based query system for semantically heterogeneous geospatial data. Our goal is to provide DBMS type query capabilities to a proposed statewide land information system. One of the main problems in querying distributed local data sources is the difference in semantics describing the characteristics (attributes) of spatial objects between various jurisdictions. To addres...

In this paper, we introduce an algorithm to delineate elementary forms on Digital Elevation Models (DEMs). Elementary forms are defined by constant values of fundamental morphometric properties and limited by discontinuities of these properties. A multiresolution segmentation technique was customized to partition the layers of altitude derivatives into homogeneous divisions through a self-scala...

In this paper, we explore the interaction between taxation and local public good (LPG) and how it impacts the spatial pattern in the framework of new economic geography (NEG). In the benchmark case of a pure LPG, the system displays a similar location pattern to the existing NEG taxation model, although the tax reduces the market size of manufactured goods. However, when we consider the inheren...

Problem: Planners, politicians, organizations, and citizens in many cities recognize community gardens as a vital part of urban food production. To fulfill community or organizational goals, it is helpful to systematically identify and assess urban vacant land that could be used as potential garden sites. Purpose: The technical purpose of this project was to demonstrate how stakeholder input co...

Projects to secure land rights for the urban poor have been implemented in Sub-Saharan Africa for over 30 years. A recurrent issue in such projects is the provision of sustainable land tenure for beneficiaries. Commonly, individual titles with restrictions on resale have been used. Despite these, recipients often sell their land rights to more affluent city dwellers exacerbating the growth of s...

To secure adequate food supply is the major challenge for humanity in the 21st century. Growing world population andits urbanization put pressure on this basic need, which is further threatened by the constant loss of fertile land. Theassessment of sustainability of food supply under increasing pressure on land resources has been selected as one of themost important priority topics ...

[1] The Palmer Drought Severity Index (PDSI) has been widely used to study aridity changes in modern and past climates. Efforts to address its major problems have led to new variants of the PDSI, such as the self‐calibrating PDSI (sc_PDSI) and PDSI using improved formulations for potential evapotranspiration (PE), such as the Penman‐Monteith equation (PE_pm) instead of the Thornthwaite equation...

This paper shows how standardization activities are progressing and contributing to the fact that Land Administration (LA) is considered more and more the cornerstone of the spatial information infrastructure. This is equally valid for regional, national, continental, and global levels, as will be illustrated in this paper. The paper describes the involved organizations and the current status o...