Changes between Version 1 and Version 2 of WikiStart


Ignore:
Timestamp:
Jul 25, 2018 9:09:26 PM (7 years ago)
Author:
Uriel
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • WikiStart

    v1 v2  
    1 = Welcome to Trac 1.2.2
     1= Maps Wiki
     2Documenting the lessons learned in trying to make a topographic world map using [http://maperitive.net/ Maperitive] and other tools. Most of this wiki will describe the process used to create a world topographic map (ie: shading based on mountains and other terrain). Adding urban data such as streets, place names, and borders was attempted but not finished.
    23
    3 Trac is a '''minimalistic''' approach to '''web-based''' management of
    4 '''software projects'''. Its goal is to simplify effective tracking and
    5 handling of software issues, enhancements and overall progress.
     4All of the files referenced here have been downloaded to or backed up on a WD Elements 6TB USB drive currently plugged into the Michigan computer at the SDI office.
    65
    7 All aspects of Trac have been designed with the single goal to
    8 '''help developers write great software''' while '''staying out of the way'''
    9 and imposing as little as possible on a team's established process and
    10 culture.
     6== Maperitive
     7Maperitive is a free application for generating maps from [https://www.openstreetmap.org/ Open Street Map] data. It is also able to generate terrain maps using a set of NASA-created global height data called '''SRTM'''. The end goal of the operation is to output the map as [https://en.wikipedia.org/wiki/Tiled_web_map Web Tiles], a set of static images at varying "zoom levels" which can be tiled together to make a seamless map.
    118
    12 As all Wiki pages, this page is editable, this means that you can
    13 modify the contents of this page simply by using your
    14 web-browser. Simply click on the "Edit this page" link at the bottom
    15 of the page. WikiFormatting will give you a detailed description of
    16 available Wiki formatting commands.
     9The downside to this is that the entire earth is very big and requires a lot of RAM to hold all the data when the map is zoomed in far enough. The solution to this was to use scripts to break the planet up into smaller pieces which can be individually processed.
    1710
    18 "[wiki:TracAdmin trac-admin] ''yourenvdir'' initenv" created
    19 a new Trac environment, containing a default set of wiki pages and some sample
    20 data. This newly created environment also contains
    21 [wiki:TracGuide documentation] to help you get started with your project.
     11=== SRTM Data
     12Maperitive uses NASA SRTM data to generate shaded terrain maps. In the past, Maperitive was able to connect to NASA's servers and download the data as needed. Since then, NASA has locked down the servers behind a free password. A newer version of Maperitive exists which might have a workaround for this issue, but this documentation presumes Maperitive can't download the data. Instead of Maperitive downloading the data, it can be downloaded manually and then just placed in a location that Maperitive expects SRTM data to be; then it will not attempt to download it again.
    2213
    23 You can use [wiki:TracAdmin trac-admin] to configure
    24 [http://trac.edgewall.org/ Trac] to better fit your project, especially in
    25 regard to ''components'', ''versions'' and ''milestones''.
     14The SRTM data comes in two resolutions:
     15* [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl1_v003 SRTMGL1], 1-arcsecond data, divides the earth into images covering 1x1 degree lat/long of most of the land. Each file is 3601x3601 16-bit pixels (~26MB).
     16* [https://lpdaac.usgs.gov/dataset_discovery/measures/measures_products_table/srtmgl3_v003 SRTMGL3], 3-arcsecond data. Each file is 1201x1201 pixels (~2.8MB).
    2617
     18If downloading more than one file at a time, SRTM data is most easily obtained from NASA's servers using the [https://lpdaac.usgs.gov/data_access/daac2disk Daac2Disk] utility. This example command will download the entire SRTMGL1 dataset to the SRTMGL1 folder: {{{Daac2Disk_win.exe --shortname SRTMGL1 --versionid 003 --nometadata --outputdir SRTMGL1}}}.
    2719
    28 TracGuide is a good place to start.
    29 
    30 Enjoy! [[BR]]
    31 ''The Trac Team''
    32 
    33 == Starting Points
    34 
    35  * TracGuide --  Built-in Documentation
    36  * [http://trac.edgewall.org/ The Trac project] -- Trac Open Source Project
    37  * [http://trac.edgewall.org/wiki/TracFaq Trac FAQ] -- Frequently Asked Questions
    38  * TracSupport --  Trac Support
    39 
    40 For a complete list of local wiki pages, see TitleIndex.
     20To download the data from the web or using Daac2Disk, you will need NASA Earthdata account: [https://urs.earthdata.nasa.gov/home]. Once you have created your account, log in and from "My Applications", add the LPDAAC Data Pool.