| With the development of geographic information system (GIS), it has been applied to urban greenland system widely. On the basis of urban greenland GIS (GGIS), the vegetation resource information and its change can be got in time, accurately and dynamically, and spatial analysis can be carried on. It' s possible to monitor and manage urban greenland system, to make scientific planning and layout, furthermore to improve urban environmental quality and make urban sustaining development.Greenland GIS in Wuhan steel & iron industrial district is a professional system that was developed on ArcView software using its second developing language (Avenue) and Visual Basic. And its aim is to daily manage, analysis and research together. At first, this paper introduce the development of GIS, the study evolvement of special GIS and the application of urban greenland by GIS and its correlated technology. On the theory of software engineering, the basic flow is discussed and some process is introduced on emphasis such as demand analysis, system design, spatial database structure, IKONOS disposal, greenland database establish and function demonstration etc.Under support of GGIS and instruction of landscape ecology, the analysis of greenland system landscape ecology in Wuhan steel & iron industrial district is conducted from such aspects as plant diversity, community structure, greenland patch character, landscape heterogeneity etc. Then landscape ecological comprehensive assessment of greenland is carried on in different districts. Some useful results are given as follows:1. The life-form spectrum of garden plants accord with subtropical climate. Patches with 7 species appear at highest frequency (12.2%), and patches with 8 species have largest area, which constitute the 20. 1% of total greenland. The species abundance of Public Park is largest (9.14). Taking the least area of species abundance into account, the best patch size ranges from lOOOm2to 5000m3. The plant communities are dominated by arbor+shrub and arbor+shrub+herbage that constitute 39.64%, 33.65% of number, and 46.95%, 25.52% of area respectively. With the improvement of community complexity,its species abundance increases.2. Wuhan steel & iron industrial district is covered by greenland at the rate of 30. 58%, which is comprised by little patches whose size are 0. 1-0. 5hm2(43. 93% of total greenland). Attached Greenland is the main patch, which occupies 45. 57% of greenland area and 76. 41% of number. The average patch size is 10779.74m2, whose variance coefficient is 6.601. According to the average patch size, the sequence is as follows: other greenland(G5)(67865. 9 m2), nursery(G2) (23792.1m2), green buffer(G3) (15319.0m2), public park(G1) (14940.7 m2) , attached greenland (G3) (6429.0 m3) .3. The average patch shape index is 2. 18. The ones whose patches are most complex are large-sized greenland patch. Public Park has the largest average shape index (3.38) whose coefficient is larger, but it has the least fractal dimension (1.112), which indicates that most of them have a simple shape (closest to circular). And their landscape connectivity indices are little (0.019), which show they distribute each other separately. Attached greenland (G4) indicates most noncircular shape, and other greenland has the largest landscape connectivity index, whereas the former spatial pattern is near to random distribution whose nearest neighbor index is largest (0. 863), and the latter is near to assembling distribution whose nearest neighbor index is 0. 577. The separation index of nursery is largest.4. In living district, the greenland landscape is characterized by large patch, even distribution, high diversity and high greenland coverage rate, while the greenland landscape is characterized by small patches, heavy fragmentation and low species abundance in factory area. And in industrial port, there are high abundant species and moderate landscape indices.5. Applying primary component analysis to the vegetation landscape ecological comprehen...
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