G I S P O R T F O L I O
CONTENT I NTRODUCTI ON BUFFERANALYSI S DEM FI LEANDDEM CLI PFI LE CONTOURANALYSI S SLOPEANALYSI S WATERSHEDANAYSI S FLOW DI RECTI ONANDBASI N FLOW ACCUMULATI ONAND RASTERCALCULATI ON STREAM ORDERSTREAM TO FEATURE
S HE ETNO 1
MAPPI NGCONCEPTS Mappi ngi sakeypar tofgi s(geogr aphi c i nf or mat i ons of t war e).I tpr ov i deeas ywayt o anal ys eandmaket ov i ew s pat i al l yi nawayt o under s t andf orr equi r edar ea Thekeyc omponentc anr epr es entt hi spl anwi t h pr operdr awi ngwi t hr epr es ent abl el egent s, hi ghl i ght abl el i nesandmar ki ngss pec i ficdat a whi c hpr ov i def r om s at el l i t edat a
L OCAT I ONPL AN
AREA:RAMAPURAM ( WARDNO 155)CHENNAI Ther epr es ent edmaps i gni fiesoneoft hewel l dev el opi ngar eai nc hennai( r amapur am)whi c h hashi ghpopul l at i onandi ns t i t ut i ons wi t ht hehel pofgi sweanal ys edt hel i s tof r equi r eddat af ort hi sar ea Byus i nggi ss of t war eweanal ys edr oads,wat er bodi es,opens pac est omakeas t udyf orwhi c h t hi sdat asar eenougnf orc ur r entpopul at i on beac us et hepopuat i oni nc i t ywasgr adual l y i nc r eas i ngs of r om t hi sdat swec aneas i l yfinda ( s wots t r engt hweaknes soppur t uni t yt hr eadi n t hi sr equi r edar ea
BOUNDRY
ROADS
WAT E RBODI E S
OPE NS P ACE S
S HE E T NO 2
BUFFERANALYSI S: Thebufferanal ys i si sus edf ori dent i f yi ngar eas s ur r oundi nggeogr aphi cf eat ur es.Thepr oc es s i nvol vesgener at i ngabufferar oundexi s t i ng geogr aphi cf eat ur esandt heni dent i f yi ngor s el ec t i ngf eat ur esbas edonwhet hert heyf al l i ns i deorout s i det heboundar yoft hebuffer . Byus i ngt hi sbufferanal ys i sc ani dent i f yt he adequat er oadwi dt hc onveni entt owal k wec anfinddi ffer entt ypesofhei r ac hybet ween t her oadswhi c hc anappearvar i ousl i newei ghtf or mai nr oad,s ec ondar yr oad,t r ec her yr oad
S HE ETNO 4
DEM FI LE: Di gi t alEl evat i onModel( DEM)i sus edt o r epr es entt heel evat i onoft hel andwi t h r ef er enc edat a.i tdet er mi net er r ai n , c ont ourands l opei nanyangl eatpr oper el evat i on
DE MF I L E
DEM CLI PFI LE: DEM CLI Pfil eus edgeogr aphi cs ys t em t o pr oduc ear el i efmapi ndi gi t alpr es ent at i on t hi sfil ei sc l i ppedt oi t sr es pec t i veboundr y us i ngt her as t ert oolc l i p
DE MCL I PF I L E
S HE ETNO 5
CONTOURMAP: Us i ngt hi sc ont ourt oolpr ovi deapr éc i s eds l ope, c ont ourandt er r ai nus i ngas at el l i t edat awhi c h s i gni fiesgr adi entl evelf r om hi ghes tc ont ourl evelt o deepes tc ont ourl eveli ndi ffer entl i newei ghtand di ffer entl i nec ol our i ngt wodi mens i onpl an Byus i ngc ont ourt ooli ngeogr aphi ci nf or mat i on s of t war ewec aneas i l yanal ys et het opogr aphyof l ands ur f ac ei nr equi r edar eaf r om t hi sweget i deol ogyaboutr unofc oeffic i entofl ands ur f ac eand findt hes ui t abl epl ac et opr ovi dedamsoranywat er t r eat mentpl anti nr es pec t edar eas. Thel egends ment i onedbel ow r epr es entt hec ont ourl evel sand hi er ar c hi es
S HE ETNO 6
S L OPEANAL YS I S: Us i ngs l opea na y s i st ool i nGI Sbyc ompa r i nga c er t a i npoi ntwi t hi nr a s t ert oi dent i f yt hev a r i ous c ount ourl ev el i nt os i ngl egr a di entout put r om t hi sout putwec a na na l y s et heov er a l l F gr a di entl ev el f r om wher et her a i nwa t ers t a r t sa nd endi ngofgr a di entt os eal ev el byus i ngt hi swec a n pr ot ec tr equi r eda r eaf r om oodorl a nds l i de
S HE ETNO 7
WAT E RS HE DANAL YS I S: T hi shy dr ol ogyt ool sa r eus edt omodel t he owof wa t era c r os st hes ur f a c e Byus i ngt hi st ool wi l l s i gniest hewa t er owi n di gi t el i z edda t a r om t hi sda t awec a npl a nordev el opet he F a gr i c ul t ur e el dora nyot herdev el opementwhi c h us ef ul f orhuma nr es our c es T hehi gherv a l uei smos t l y oodz oneora nyot her wa t ert r ea t mentpl a nti sl oc a t edbec a us et hi s des c r i best hehi ghes t owr a t ev a l ue
S HE ETNO 8
WAT E RS HE DF L OW DI RE CT I ON:
WAT E RS HE DF L OW DI RE CT I ON
T hi st ool us edt odet er mi net hedi r ec t i onofow ofwa t eri na c c ur a t epi x el i ndi gi t a l ma nnerus i ng r a s t ert ool whi c hc r ea t est hedeepes tdowns l ope gr a di ent
WAT E RS HE DBAS I N: T hi st ool us edt or a s t era l l dr a i na geba s i nsby a na l y s i ngr i dgel i nebet weenba s i ns
WAT E RS HE DBAS I N
S HE ETNO 9
WAT E RS HE DF L OW ACCUMUL AT I ON: WAT E RS HE DF L OW ACCUMUL AT I ON
Byus i ngt hi st ool wi l l a na l y s et hec onc ent r a t ed owr a t ea ndc a nbeus edt oi dent i f ys t r ea m c ha nnel s
WAT E RS HE DS T RE AMF L OW Byus i ngt hi st ool c a nper f or m ma t hema t i c a l oper a t i onsa ndf unc t i ons, s ha pe l es, c ov er a ges, c ons t a nt set c
WAT E RS HE DS T RE AM F L OW
S HE ETNO 10