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2.1 Preliminaries
2.2 Project Area
2.3 Project Map
2.4 Map Frames
___2.4.1 Frames Check
2.5 Grid Templates
___2.5.1 Grid Check
2.6 GEBCO Contours
2.7 Sediment Thickness
2.8 Boundaries & Coast
2.9 Marine Regions
2.10 Text Spreadsheet
2.11 Number Spreadsheet
2.12 Cutting a Shape
___2.12.1 Cutting Check
2.13 0-360 System
2.15 Shape from XYs
2.18 Navy Waves
2.19 IDV & THREDDS
2.20 Land Stations
2.21 HDF Chloro/Sal
2.22 HDF SST
2.24 Coastal Survey
2.25 NetCDF with NaN
2.26 Google Digitizing
2.27 UTM->WGS84
2.28 WGS84->UTM
2.29 Nav Charts
2.30 Argo MLDs
2.31 SST/Ice Climate
2.32 EU Wave Climate
2.33 GSHHG Vectors
2.34 GlobWave Grids
2.35 MGD77 Surveys
2.36 ColorWeb T/Chl/S
2.37 Named Places/Features
2.38 Giovanni Chlorophyll
2.39 Set Properties
2.40 Adding Graticules

Home > 2. Marine GIS > 2.5 Grid Templates > 2.5.1 Grids Check

2.5.1 Accuracy Check for Grid Templates

New Version of Saga:  Usually a new version of Saga is quickly assimilated into these exercises.  The latest release, Version 2.1.2, is so radically different that it will take some time to catch up with revised exercises.  Please email me immediately whenever you find an old exercise that simply cannot be accomplished in the new Saga, due to big changes in the properties, etc.  I will try to provide fixes within about 2 days.

Exercise Title:  Accuracy Check for Grid Templates Author:  Murray Brown Version:  February 2013
1. Into Saga, load all of the dummy grids (1-deg, 0.5-deg, 0.1-deg, 0.05-deg and 0.01-deg).
2.  Make maps with the graticule on top of each dummy grid.  They must match exactly. NOTE:  A 1-pixel offset as seen here, is due to normal numerical errors on the PC graphics chip, and can be ignored.  After magnification it remains the same, a characteristic of chip problems.
3.  This check must be performed separately for each of your dummy grids!