基于规则格网DEM提取地形特征线的方法研究

《基于规则格网DEM提取地形特征线的方法研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文基于规则格网DEM提取地形特征线的方法研究姓名：倪星航申请学位级别：硕士专业：摄影测量与遥感指导教师：齐华20080501西南交通大学硕士研究生学位论文第1I页AbstractDigitalElevationModelcontainsavarietyoffeaturesinformationofthestructureoftopographic，suchasRidgeandValleyLine．RidgeandValleyLineisthelineinundulatingterrainchanges，butalsoisthe

2、waterseparationlineandthewatercolletionline．Itisnotonlyimportantsignificancetostudythetopography,butalsoinengineeringapplications．Duetothestructureofthedata，gridDEMoftendidnotke印topographicalfeatures，suchasthecurrentnationalproductionof1：1millionDEM．Sothestudyofautomaticallyex

3、tractetheRidgeandValleylinefromDEMisbecometooneofthekeyproblemsinEarthSciencesresearch．Thispaperaimsatthe鲥dDEMproductedbytotheexistingterrainmap，andstudytheextractionmethodforextractiontopographiccharacteristics．Themethodforextractingtopographicalfeaturesofthedomesticandintern

4、ationalsituationandstudythetheoryisintroduced,theimportanceofterraincharacteristicsanalysistoispresented,thejudgementreasonandmethodsforextractionthetopographicfeaturelineisSummarized,theprinciplesandmethodsofextractionslope，aspectandthecurvaturebasedongridDEMissystematicdiscu

5、ssed．ThedatapreprocessingbasedongridDEMisresearched，andthemethodforbillabongtreatmentisimproved．Theauthorconsiderthathowtoefficientandaccurateextractetheterrainfactor,howtoreasonablemakedecisiontheclassificationschemeaftercapturedtheterrainfactoristhekeytechniquetoextractionto

6、pographicfeaturebasedon鲥dDEM．Theverificationoftheoreticalanalysisandexperimentalmethodinthepaperisapprovedthroughtheexperiment．Thecontributionofthepaperisexpresentedinthefollowingtwopoints．西南交通大学硕士研究生学位论文第1II页．First,theexistinggridDEMdatapreprocessingisimproved,thebasedonthegr

7、idclassificationandretrievalofthenewDEMsourcedatapreprocessingalgorithmsisgived，thesearchedgndisgivedthecorrespondingtreating，SOastoreachtonobillabongeffection．Second．theextractedalgorithmbasedongndDEMisgivedthroughidentificationthepotentialregionalof,andcombinedtopographicalf

8、eaturepointsthatuseofSplitmethodtoachieved，carriedoutextracti