Exam 4 (Mod 9-11) Flashcards
What are the 5 key node folders (express framework)?
bin, public, views, node_modules, and routes
What folder in the express framework is responsible for the startup (contains core software)?
app.js
Which node folder holds the www file containing the startup script for the webserver?
bin
Which node folder contains all front-end content?
Public -> holds front-end js librarys, css files, static files, favicon.ico,
Which node folder does the require() function look for libraries?
node_modules
Where are node pug files kept within the node folder structure?
views
What are 6 common node packages for geospatial (list and describe their purpose)
1) Proj -> provides coordinate system transformations
2) Leaflet -> Js web mapping client
3) OpenLayers -> Js web mapping client
4) Pg -> connect and SQL w/ postgresSQL
5) Proj4leaflet -> to reproject for leaflet
6) Express-session -> back-end framework
What is NodeJs and what are its 7 components and their role?
NodeJs is an open-source, cross platform JavaScript runtime environment.
Below is a list of its 7 components:
1) crypto -> encryption
2) DNS -> domain name system
3) Event Loop -> for non-blocking IO
4) node bindings -> http, socket, file system
5) node Standard lib -> ~ 35 Js files
6) thread pool -> where all the long-running operations are performed in the background
7) V8 Engine -> interprets the JS
What are the 6 components of node express?
1) node
2) express
3) router
4) Pug What is it?
5) method
6) npm What is it?
What are the main characteristics of Pug?
- shorthand HTML with no closing tags (mix of Js & HTML)
- variables that usually contain JSON from server
- indentation sensitive
What are the 9 key files in a node Javascript App?
app.js
user.js
index.js
gist7132.js
error.pug
index.pug
layout.pug
styles.css
gist7132.css
Name 7 current webstorm projects.
Angualar
Bootstrap
Dart
Empty
HTML5 BP
Node Express
Phonegap
What are the 12 possible geometry types?
CIRCULARSTRING
CURVEPOLYGON
GEOMETRYCOLLECTION
LINESTRING
MULTILINESTRING
MULTIPOINT
MULTIPOLYGON
POINT
POLYGON
POLYHEDRAL SURFACE
TIN
TRIANGLE
What are 8 spatial file formats?
What are 12 Google chart style options?
Area
Bar
Bubble
Candlestick
Column
Donut
Gantt
Geo
Map
Pie
Table
Trendlines
What are 8 characters that might be used when parsing?
Braces
Brackets
Comma
Equal
Parentheses
Semicolon
Space
Colon
List 10 functions related to JSON.
row_to_json
array_to_json
to_json
json_array_length
json_each
json_object_keys
json_agg
st_geomfromgeojson
st_asgeojson
st_astopojson
What are 10 functions used to create geometry?
ST_Envelope
ST_Buffer
ST_ConvexHull
ST_Difference
ST_Union
ST_Intersection
ST_SymDifference
ST_Area
ST_Extent
ST_3DExtent
What are 10 input or output file formats that can be used with Postgis?
ewkb
ewkt
geoJSON
gml
JDBC-native
kml
shapefile
svg
wkb
wkt
What are 10 functions that inspect geometry?
ST_X
ST_Y
ST_Length
ST_EndPoint
ST_StartPoint
ST_PointN
ST_NumPoints
ST_Area
ST_ExteriorRing
ST_InteriorRingN
ST_NumInteriorRings
ST_NumGeometries
ST_GeometryN
List the SRID’s and the Projections or Coordinate Systems they are associated with. This card will be used as a reference for further SRID questions.
SRID—Name—-Type—-Comment
3005—MELP—AblersPlanar—The best ever!
3161—NAD83 / Ontario MNR Lambert—Planar—They think they are the best but there are not
3401—Alberta 10-TM—Planar—Wide like their roads
3857—Web Mercator—Planar—Google Maps, Bing, OSM, OL, Leaflet
3978—NAD83 / Canada Atlas Lambert—Planar—Canada’s projection according to the feds
3979—Canada Atlas Lambert—Planar—Web Services at geogratis (federal data)
4267—NAD 27—Polar—We are in Kansas
4326—WGS 84—Polar—YOUR phone!
26907—UTM zone 7N nad83—Planar—BC - Tatshenshini
26908—UTM zone 8N nad83—Planar—BC - Masset
26909—UTM zone 9N nad83—Planar—BC - Port Hardy
26910—UTM zone 10N nad83—Planar—BC - Lower Mainland
26911—UTM zone 11N nad83—Planar—BC - Cranbrook
What is the SRID for Alberta?
3401—Alberta 10-TM—Planar—Wide like their roads
What is are the SRID’s for the two most common coordinate systems WGS 84 and NAD 1927
4326—WGS 84—Polar—YOUR phone!
4267—NAD 27—Polar—We are in Kansas
What are 11 types of spatial relationships?
Name 5 spatial extentions for PostgreSQL.
topology
tiger
pointcloud
pointcloud_postgis
pg_routing
What are 8 Postgis components?
POSTGIS
GEOS
PROJ
GDAL
LIBXML
LIBJSON
RASTER
SFCGAL
What are 5 Metadata tables and views.
public.spatial_ref_sys
public.geometry_columns
public.geography_columns
public.raster_columns
punlic.raster_overviews
What is Webstorm?
Webstorm is an Itegrated Development Environment for Javascript
What is VSCode?
VSCode is a multi language code Integrated Development Environment.
List some common webserver methods.
OPTIONS
GET
HEAD
POST
PUT
DELETE
TRACE
CONNECT
PROPFIND
PROPPATCH
MKCOL
COPY
MOVE
LOCK
UNLOCK
VERSION-CONTROL
REPORT
CHECKOUT
CHECKIN
UNCHECKOUT
MKWORKSPACE
UPDATE
LABEL
MERGE
BASELINE-CONTROL
MKACTIVITY
ORDERPATCH
ACL
PATCH
SEARCH
What is 3NECBH ™?
Node Never Ending Nested CallBack Hell
What are the various JS coding styles?
- Old school functions (KISS-style)
- New school objects (WAR-style) FLATTEN EVERYTHING!
- JSON - way too many colons when there should be none!
- 3NECBH ™ - Node Never Ending Nested CallBack Hell
- Promises, Promises
What web-browser is Fetch incompatible with?
Internet Explorer
What are the two core components of AJAX?
a XMLHttp request (can also be JSON or plain HTML) and a callback function responsible for the UI unpdating
What is the main purpose of AJAX and Fetch?
reactive webpages -> updating content without needing to refresh the entire webpage
What is the core component/paradigm of the Fetch API?
Promise chain
<blank> is a translator library for raster and vector geospatial data formats as a core dependency of the postgis extension
</blank>
GDAL
<blank> and <blank> are both a C/C++ library for computational geometry with a focus on algorithms used in geographic information systems (GIS) software as a core dependency of the PostGIS extension
</blank></blank>
GEOS and SFCGAL
<blank> is a generic coordinate transformation software that transforms geospatial coordinates from one coordinate reference system (CRS) to another. This includes cartographic projections as well as geodetic transformations. It is a core dependency of the PostGIS extension
</blank>
proj
What’s the difference between WKT and WKTE?
WKTE is Well know text but with knowledge of SRIDs
what is GML?
Geography Markup Language (GML) is an XML grammar for expressing geographical Features
What are the OGC geometry types supported by PostGIS?
POINT, LINESTRING, POLYGON
MULTIPOINT, MULTILINESTRING, MULTIPOLYGON
GEOMETRY COLLECTION
*Also supports Z and M versions and SRID
what is the general syntax for the PostGIS geometry constructor?
geometry(type,srid)
What functionality does the tiger extension provide?
geocoding
what is the role of the;
1) Space
2) Comma
3) Paraenthises
4) Semicolon
5) Equal signs
in WKT and EWKT syntax
1) separates X Y Z and M values
2) separates coordinates/ordinates
3) group and separate coordinate pairs
4) separates the SRID from the geometry
5) assigns the SRID value
