共查询到20条相似文献，搜索用时 562 毫秒
1.
Biplab Biswas 《Journal of the Indian Society of Remote Sensing》2009,37(4):705-717
Markov chains have been used to model spatial changes in a variety of spheres. Changes in social situations, economic standards,
natural resource availability, and even weather conditions have been explored and predicted using Markov Random Function (MRF)
and Markov Random Chains (MRC). In this section, we try to use data of Mahata village of Bhatar Block, extracted from GIS
based maps/images in a MRC to obtain present transition probabilities and predict future changes. The village is facing the
problem of decreasing the water table and at the same time the number of surface water bodies is also decreasing. This is
a serious situation for the development of the agricultural activities in general and at the same time it poses threat to
the human habitation of the village in the long run. The average depth of the ground water table from ground level increased
from 8 meter to 15 meter within the last 10 years. The threat is coming from the changes in land use and land cover, especially
due to substantial extension of agricultural activities which is expanding at a very fast rate. Increasing population is also
demanding more lands for settlement and industrial uses. The surface water bodies i.e. the ponds etc. are used for such intensive
irrigation purposes. As a result the surface water bodies depletes before the onset of summer. The cultivators use those dried
up ponds or surface water bodies for agricultural purposes also. There is thus a serious trend to convert the surface water
bodies into the agricultural land. It is estimated using MRC, that in next 25 years, the number of surface water bodies will
deplete by 50% in the agriculturally active Bhatar PS at the current rates of depletion. Shifting to less water needy crops,
prevention of LULC conversion, and water harvesting would provide some solace to the situation. 相似文献
2.
Milind R. Wadodkar T. Ravisankar 《Journal of the Indian Society of Remote Sensing》2011,39(4):529-536
A study was carried out in village Mohammadabad, Nalgonda district, Andhra Pradesh to demonstrate the potential of high-resolution
remote sensing data in generating soil resource database at village level that would facilitate natural resource developmental
planning. For this study, detail soil resource database was generated by interpreting IRS Resourcesat-1 LISS-IV + Cartosat-1
merged data and by undertaking soil survey and soil analysis. This database was integrated with cadastral map and was analysed
for preparation of an action plan for the village that included recommendation on suitable crops, soil and water conservation
measures and distribution of soil health card to farmers. The study indicates that the LISS-IV + Cartosat-1 merged satellite
data helps in mapping soils at phase level and in delineation of more number of pure soil mapping units i.e. consociations at 1:10.000 scale. The plot-wise resource potential and constraints reveals that significant inter and intra-field soil variability
exists. Soil fertility assessment indicates that the soils of the village are low to medium in fertility (available NPK Content)
and micronutrients like copper, manganese and iron content is above the critical level for optimum growth of crops while zinc
content is less than the critical level. 相似文献
3.
G P OBI Reddy A K Maji C V Srinivas M Velayutham 《Journal of the Indian Society of Remote Sensing》2002,30(1-2):15-31
In recent years, the use of remotely sensed data and Geographic Information System (GIS) applications has been found increasing in a wide range of resources inventory, mapping, analysis, monitoring and environmental management. Remote sensing data provides an opportunity for better observation and systematic analysis of terrain conditions following the synoptic and multi-spectral coverage. In the present study, the geomorphological analysis reveals that various denudational and depositional landforms have been analysed and mapped. The soil depth ranges from extremely shallow in isolated mounds to very deep in the pediplains. Based on the slope gradient, morphometry, soil depth, vegetation cover and image characteristics of standard FCC imagery of IRS-1D LISS-III data, four categories of eroded lands i.e., very severe, severe, moderate and nil to slight have been identified and mapped. The integrated analysis of slope, geomorphology and degraded lands layers in GIS revealed that the pediplains, rolling plains and subdued plateau are associated with very severe land degradation and accounts for 6.05%, 3.85% and 3.47% of total area respectively. The analysis of percentage of degraded lands at geomorphic sub unit level indicates that severe land degradation process is dominant in the dissected ridges, isolated mounds, escarpments and plateau spurs. The remote sensing data and GIS based detailed geomorphological and degraded lands analysis ensure better understanding of landform-eroded lands relationship and distribution to assess the status of land degradation at micro geomorphic unit for reclamation, geo-environmental planning and management. Similar study also helps in the areas of natural resource management, environmental planning and management, watershed management and hazards monitoring and mitigation. 相似文献
4.
Sanjay K Gupta M Hussain M Ahmed A S Pandey P Singh K M Saini S N Das 《Journal of the Indian Society of Remote Sensing》1998,26(4):161-168
In this study, an attempt has keen made for the identification, categorisation and mapping of degraded lands in Palamau district of Bihar using remotely sensed data (IRS-1A, raise colour composite, on 1:50,000 scale), It was observed that water erosion is the main cause of land degradation affecting 6.27 per cent area of the district, of which 5.22 per cent is subjected to severe to very severe erosion and remaining 1.05 per cent is moderately to severely gulleid land Degradation due to rock quarries, mine spoils and dumps accounted for only 0.01 per cent of the district area. Degraded lands were mostly confined to agricultural areas (4.76%) follwed by forest lands (1.10%) and opert-scrub/pastures (0.42%), respectively, Subdivision-wise categorisation of degraded lands was also attempted for efficient location-speeific reclamation planning and easy monitoring. 相似文献
5.
R. P. Singh V. N. Sridhar V. K. Dadhwal R. Jaishankar M. Neelkanthan A. K. Srivastava G. D. Bairagi N. K. Sharma S. A. Raza Rajesh Sharma Manoj Yadav F. K. Joshi N. L. Purohit 《Journal of the Indian Society of Remote Sensing》2005,33(1):93-98
This paper presents results of a pilot study in six villages located in the states of Haryana, Rajasthan and Madhya Pradesh, to evaluate accuracy of crop area at village level estimated by IRS - LISS-I1I data with respect to detailed field survey carried out by National Sample Survey Organization. The selected villages were located in Karnal, Kota and Bhopal districts which represented single dominant wheat crop as well as wheat-mustard and wheat-gram situation, respectively. Accuracy assessment of remote sensing based estimate with field survey of NSSO showed relative deviation in wheat estimate ranging from 3.72 percent for Mainmati village in Karnal district in Haryana to 22.65 percent fo Ranpur village in Kota district of Rajasthan. It was found that relative deviation in area estimation is inversely poportional to the crop proportion in that village. Observations of over estimation at low crop proportion and underestimation at higher crop proportion was explained by simple budgeting of relative proportion of ommision and commision errors. The study demonstrates that on the average, 90 percent crop area accuracy is possible with LISS-II1 data and the adopted approach. 相似文献
6.
黄河三角洲盐碱地动态变化遥感监测 总被引：27，自引：1，他引：27
运用多期陆地卫星图像数据,结合野外调查及采样分析,对黄河三角洲近15a来盐碱地的动态变化进行了监测.研究区内发现盐碱地面积呈不断扩大趋势,不同类型的盐碱地变化不同:轻盐碱地不断增多,重盐碱地逐渐减少,光板地先增后减.盐碱地数量方面的增减并没有对盐碱地在不同土地类型中的空间分布格局产生太大影响. 相似文献
7.
S. Natarajan N. Y. Gajbe M. L. Manchanda 《Journal of the Indian Society of Remote Sensing》1986,14(1):17-24
A soil and land use survey of Mewat area, Haryana, was carried out using the aerial photographs of 1:50,000. Four major physiographic units namely hills, piedmont plain, intermontante basin and Yamuna alluvial plain were recognised. The land use was studied in relation to the physiographic units. The legend adopted for land use classification has physiography at first level, utility at second level and management and identification at third and fourth levels respectively. Of the total area of 161,103 ha surveyed, 131,637 ha (81.72%) are cultivated. Of this 75,967 ha (47.16%) irrigated and 55,670 ha (34.56%) is unirrigated. Under uncultivated area, barren lands cover 14,224 ha (8.82%), forests occupy 3,463 ha (5.25%), settlements cover 3,300 (2.05%), water bodies occupy 1,312 ha (0.81%) and roads, railway lines, canals and drains constitute 2,167 ha (1.55%). 相似文献
8.
To enhance the ability of remote sensing system to provide accurate, timely, and complete geo-spatial information at regional or global scale, an automated change detection system has been and will continue to be one of the important and challenging problems in remote sensing. In this paper, the authors propose a framework for automated change detection system at landscape level using various geo-spatial data sources including multi-sensor remotely sensed imagery and ancillary data layers. In this framework, database is the central part and some associated techniques are discussed. These techniques includes five subsystems: automated feature-based image registration, automated change finding, automated change feature extraction and identification, intelligent change recognition, change accuracy assessment and database updating and visualization. 相似文献
9.
SUI Haigang LI Deren 《地球空间信息科学学报》2001,4(3):29-34
1Ｃｕｒｒｅｎｔｃｈａｎｇｅｄｅｔｅｃｔｉｏｎｔｅｃｈ ｎｉｑｕｅｓＡｕｔｏｍａｔｉｃｃｈａｎｇｅｄｅｔｅｃｔｉｏｎｉｎｉｍａｇｅｓｏｆａｇｉｖｅｎｓｃｅｎｅａｃｑｕｉｒｅｄａｔｄｉｆｆｅｒｅｎｔｔｉｍｅｓｉｓｏｎｅｏｆｔｈｅｍｏｓｔｉｎｔｅｒｅｓｔｉｎｇｔｏｐｉｃｓｏｆｉｍａｇｅｐｒｏｃｅｓｓｉｎｇ .Ｉｔｆｉｎｄｓｉｍ ｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｓｗｉｔｈｉｎｄｉｆｆｅｒｅｎｔｃｏｎｔｅｘｔｓ,ｒａｎｇ ｉｎｇｆｒｏｍｖｉｓｕａｌｓｕｒｖｅｉｌｌａｎｃｅａｎｄｖｉｄｅｏｃｏｄｉｎｇｔｏｔ… 相似文献
10.
三生空间协调度的中泉镇农村居民点布局优化 总被引：3，自引：0，他引：3
针对构建乡村振兴新格局中分类推进乡村发展的问题,基于三生空间协调度模型,该文选取甘肃省景泰县中泉镇为研究区,开展三生空间协调度计算与分析,并结合居民点布局优化方向,将中泉镇居民点优化类型划分为城郊融合型、集聚提升型、规模管控型和搬迁撤并型4类。实验表明:中泉镇城郊融合型居民点共有21个,占比2.73%,主要分布在中庄村;集聚提升型居民点392个,占比52.84%,分布在龙湾村、腰水村、三合村、尾泉村、胡麻水村和长生村;规模管控型居民点共有365个,占比32.16%,分布在红砚台村和大水村;搬迁撤并型居民点共有95个,占比12.26%,分布在崇华村和白水村。该研究可为乡镇尺度农村居民点布局优化提供参考。 相似文献
11.
明晰集体土地产权,加快推进农村集体土地确权登记发证是当前国土资源管理中的一项重要任务。我国农村集体土地建设用地具有分布广、范围大、分散凌乱等特点,如果按照城镇地籍调查规程开展农村地籍调查,则面临着基础薄、任务重、投入高、时间紧等问题。为此,本文提出一套以高分辨率遥感影像为底图,快速绘制农村集体土地建设用地地块图形、并与实地丈量的边长、面积等属性数据关联、实现图属一体化管理的技术方法,并进行了精度评定试验。基于该技术开发了农村集体土地建设用地数据库建库工具和管理系统,实现了网络化农村集体土地建设用地管理,并在三个试点地区得到较好的应用。 相似文献
12.
R. P. Malik A. V. Shanwal H. S. Iyer 《Journal of the Indian Society of Remote Sensing》1984,12(2):59-64
Salinity is creating great problems in the Yamuna Alluvial Plain. State Government is taking steps for reclaiming these lands to increase agricultural production. Impeded drainage, excess canal irrigation, topography parent material, shallow depth and bad quality of ground water are the main factors which are responsible for the genesis of saline soils in the alluvial plains of Haryana. On the arial photographs tonal differences on account of salt concentration in the soil are clearly seen. These differences are aslo associated with physiography and soil conditions which can be easily delineated. The information thus; collected can be used for reclamation of saline soils. 相似文献
13.
为克服投影变形对村庄地籍调查精度的影响,在不采用改变高斯投影带中央经线建立独立坐标系的情况下,本文通过采用抵偿高程面、抵消投影变形、保证地籍调查精度的原理方法,针对村庄地籍调查区域广、数据量大的特点,采用直接坐标改正的方法,不需要对控制测量成果进行重新解算,可以有效、快速地实现成果纠正,在村庄地籍调查实践中应用取得了较好的效果。 相似文献
14.
随着村情村民信息管理日趋复杂,城乡信息化管理服务水平和行政资源配置等多方面的差距,导致目前村镇社会管理水平相对落后,大部分工作仍依赖于人工办理,传统的村镇管理模式与多元化的城市管理之间存在巨大差异。如何依据村情村民信息、利用信息化手段提高村镇公共管理水平,健全新型农村基层管理和服务体制成为当前面临的重要问题。因此,本文提出基于基础地理数据资源及国情监测资源,利用信息化手段构建村镇信息管理系统,通过对不同结构居民管理与村情关联分析,作为应用于村镇信息化管理的一种服务模式,从建设目标、设计思路和功能设计几个方面开展系统建设,为村镇信息化建设提供新型技术手段和管理模式。 相似文献
15.
村庄信息的快速入库、批量处理和质量评价是村庄科学规划和合理治理的前提。本文以城镇近郊区为实验区,初步开发了城镇近郊区数字村庄数据库系统。经过对系统功能的测试和评价可知,本系统能应用于数字村庄基础数据管理,并可作为数据后台支持数字村庄系统的正常运行。本系统的数据管理等功能,能够为"空心村"治理工作提供一定参考。 相似文献
16.
17.
D. K. Rout P. K. Parida G. Behera 《Journal of the Indian Society of Remote Sensing》2005,33(2):291-295
The breaching of the NALCO Ash-pond in the midnight of December 31, 2000 had caused a serious havoc in 26 villages of the
Angul and the Talcher Tahasils of Angul district in Orissa. The Nandira Jhor, a tributary of the Brahmani river flowing adjacent
to the pond carried ash to the Brahmani river and its effect was noticed up to 50 km downstream of the river. A study was
immediately taken up to assess and evaluate the extent of affected areas using high resolution optical data IRS-ID(PAN) and
IRS-ID LISS III of period January 6, 2001. The cadastral maps covering 14 villages of the Talcher Tahasil and 12 villages
of the Angul Tahasil were scanned and complete mosaic of 26 villages was prepared. The village layer map was superimposed
on the merged data (IRS-ID LISS III+PAN) product at scale 1:8000 and the affected areas were identified village-wise. The
final map was immediately handed over to the NALCO authorities for initiation of relief measures. The landuse/ land cover
map of pre-breaching (IRS-ID LISS III December 12,2000) and post-breaching (IRS-ID LISS III January 6, 2001) periods were
prepared and the spatial extent of different landuse/ land cover class for two dates data were calculated village-wise separately.
It was revealed that most of the agricultural lands, land with or without scrub, fallow areas were fully submerged with water
mixed with ash. It is seen that villages namely Dighi, Gurujanguli, Nuagoan, Khamana of the Talcher Tahasil and the villages
namely Tetoi, Tentolei, Balaramprasad of the Angul Tahasil were seriously affected with high rate of ash deposits. 相似文献
18.
应用了多种不同类型的卫星遥感数据,利用遥感与GIS结合的技术手段,解译并提取了成都市全域现状山、水、田、林、城市建设用地、新农村等现状基础数据,为科学地进行成都市生态总体规划与建设、管理和监测提供基础资料和科学依据。 相似文献
19.
以我国正在开展的村庄整治规划为背景,针对该过程中数据来源复杂、种类繁多、管理混乱、海量和不规范等问题,以村庄为管理单元设计相关的数据库存储结构与数据标准。基于ArcEngine组件和ArcSDE空间数据库引擎技术,采用面向对象设计方法构建村庄整治资源数据库系统,实现村庄整治相关数据的信息化管理,并以村庄整治资源数据库系统为平台,利用GIS技术和思想实现村庄可视化的信息管理,辅助村庄整治工作的规范实施。 相似文献
20.
利用GPS载波相位差分测量技术，借助时间偏差改正、姿态改正、高程转换、信号处理和吃水改正，获得了测船处精密在航潮位。该方法已在几个GPS在航潮位测量实验中得到了验证，并取得了理想的结果。 相似文献