Ovido
Langue
  • Anglais
  • Espagnol
  • Français
  • Portugais
  • Allemand
  • Italienne
  • Néerlandais
  • Suédois
Texte
  • Majuscules

Utilisateur

  • Se connecter
  • Créer un compte
  • Passer à Premium
Ovido
  • Accueil
  • Se connecter
  • Créer un compte

Lecture 8: Topgraphical modelling

What does terrain influence?

building, transportation and drainage costs

What does topography indirectly influence?

soil erosion

Topography can be presented in which type of data:

Raster and vector data

TIN =

Traingular Irregular Network

What are the three continuous data in digital form?

DEM, DTM, DSM

How is topographical in raster form created?

created by interpolation

Cell value in topographical raster data represents:

the elevation in the centre of corresponding surface

What are the difficulties with DEMs

Sinks and flat areas

Why are sinks and flat areas a problem?

problem in hydrological modelling

How to solve sinks and flat areas?

Either fill the sinks and create a slope or use program that can handle the situation

When to estimtate volumes?

if we want to build a road and estimate cutting and filling volumes

How to estimate volumes?

check differences in elevation between the cells and the planned road by multiply by cell size

DTM is derived from a...

DEM

What is drainage direction?

the flow direction of non blocked surface water and equals the aspect values

What is viewshed

the field of view

The results of all DEM/DTM operations are VERY sensitive to...

cell size

The zenith angle to the object of interest has to be..

the smallest of them all if the object is in view

Quiz
maatschapijleer
Economie katern 3
Economie katern 2
Economie katern 1
Criminal Law- recklessness
EMC - La République française
Science
CFA
PSYCH 333: Infancy & Toddlerhood
PSYC-1000:Unit 2,
Vocabualry
Energy: Some Basic Principles
Phonetic alphabet
Clinical skill levels
physics 10
Radio Signals
diversity terms
Powerline Commands
Dispatch Regions
biology
Physics
Marxist theory
Ratio's
Soc Midterm #2-
Residential Tenancies Act
cells
PSYCH 333: Middle childhood
media theory midterm - semiotics
zinnen blz.22
spaans indefinido uitgangen ar
film
Psykologi - Stress och kriser
Lecture 7: Raster data analysis
Lecture 6: Raster structures
maarschappij - H 2 en 6
tenta 2
group 1 , group 7 , group 0
metals and non metals
biology gcse
Droit
Tidig utveckling 0-2 år
Histoire Géo Séquence 2
Psykoanalytisk teori (Stadieteorier)
Carbohydrates
french vocab - 5/11/23
german vocab 6/11/23
Biologie hoofdstuk H11
biology
biology
forces