Saeler- Week 3

Chapter 4-1 importing data into a new ArcGIS Pro project
– create project
–Open Arc project, under new project click map then determine name and location and ok it
–save project as (tutorial4-1YourName)
-set up folder connection
–use folder connections for quick and easy access
–open catalog pane- expand folders expand youth pop- add folder connection- browse to chapter 4 file add MaricopaCounty to box and ok
-converst a shapfile to a feature class
–shapefile is a spatial data format for a point, line, or single layer polygon
–on analysis tab in geoprocessing group click tools- in georprocessing pane search for export features(converts shapefile to feature class)- for input features click browse then expand folders select desired and ok- for output feature class type cities (for this instance)
-import data table into file geodatabase
–verticle columns have attributes names, describing data in column
–horizontal row represents a census tract
–export data tool
-use database utilities in catalog pane
–create, copy, rename, and delete file geodatabases and anything else in the catalog pane
–deleting tables and feature classes from a file geodatabase is permanent however recoming a layer from contents pane only removes it from map
4-2 modifying attribute tables
-delete unneeded columns
–in contents click tracts then data design then fields- this view allows to create and modify fields in a table- hold ctrl while selecting then restore anything you dont want to delete then save to finilize deletion
-add field and populate it using calcculate field tool
–for census data must retrieve from actual website then add census areas and join datta tagble to shaprfile attribute table bsed on geocode to make file managable-ensure both tables are able to be joined with no leading zeros in file id
-file joins arent permanent to do so export features
4-3
–linking tabular data to the spatial features in feature classes.
–linkage allows symbolize maps using the attribute data
-data range queries

• queries often use date-range criteria
• 4-4
  • aggregrating data with spatial joins
    • aggregation of piont data requires a spatial join
• 4-5
  • Arc creates central points on the fly and renders them as point features if graduated symbols for symbology is chosen
• 4-6 creating a new table for a one to many join

Chapter 5 spatial data

• 5-1 working with world map projections
  • • geographic coordinate systems use latitude and longitude coordinated for locations whereas projected coordinate systems use a mathematical transformation from an elliposid to a flat surface and 2d coordinates
  • examine a world map in geographic coordinates
    • distortions are caused by displaying a map in geograaphic latitude and longitude coordinates
  • project the map on the fly to hammer-aitoff
• 5-2 working with us map projections
  • • you can either get accurate areas or accurate shapes and angles but not both
  • setting projected coordinate systems for the united states
• 5-3 setting projected coordinate systems
  • • for medium and large scale maps use localized projected coordinate systems tunded for the study area and that have little distortion
  • look up a zone in the sate plane coordinate system
    • state plane coordinate system is a set or coordinate systems that seperates the states and its territories
  • add a new layer to set a maps coordinate system
    • 2 options- add a layer with a coordinate system to a blank map, set a default  coordinate system for all new maps in a project
  • add a layer that uses geographic coordinates 
  • change a maps coordinate system
    • us developes the universal transverse mercator grid coordinate system it covers the worl dwith 60 long zones defined by meridians that are 6 defrees wide 
• 5-4 working with vector data formats 
  • examine a shapefile 
    • many spatial data suppliers use the shapefile data format
    • shapefile consists of at least 3 files- shp(geometry of features), dbf(attribute table), and shx(index of spatial geometry)
  • import a shapfile into a file geodatabase and add it to a map
    • use conversion tool to convert a shapefile into a feature class and store it in a file geodatabase
  • x,y data
    • GPS units and many databases provide aspation coordinates as x,y coords
  • convert a KML file to a feature class
    • kml is file format ssed to display geographic data in many mapping allplications
• 5-5 working with us census map layers and data tables
  • dowlad census TIGER files
    • when using census data or frequently updated data ensure use of correct time period
  • Dowload census tabular data
  • process tabular data in excel]
    • you can use excel to clean up dowloaded data making it easier and more accurate to use
  • add and clean data in arcgis pro
  • join data nad create a choropleth map]
• 5-6 dowloading geospatial data
  • • many government organizations display their data on public websites such as DOC, NASA, EPA, etc.
  • Add a land use layer from arc living atlas
  • extract raster features for hennepin county
  • Dowload local data from a public agency hub
    • many local agencies supply spatial data through open data portals or hubs

Chapter 6

• geoprocessing
  • • • a framework and set of tools for processing geographic data
  • 6-1 dissolving features to create neighborhoods and fire divisions and battalions
    • examine the dissolve field and other attributes
      • pairwise dissolve tool needs a dissolve field for combining block groups 
    • dissolve block groups to create neighborhoods
  • 6-2 extracting and clipping features for a study area
    • • tutorial is a workflow for creatinga study region from layers that have excessive features
    • use sselect by attributes to create a study area
      • study area is important when working geogrpically dense areas like NYC with streets and blocks
    •  use select by location to create study area block groups
• 6-3 merging water features
  • merge features
    • use merge geoprocessing tool to create one water feature class from 5 seperate classes
• 6-4 appending firehouses and police stations to ems facilities
  • append features
    • use append tool to append firehouses and police stations to already exisiting ems points 
• 6-5 intersecting features to determine streets in fire company zones
  • open tables to study attributes before intersecting
    • observing attribute tables of each feature class familiarizes you with attribuetes before intersecting features
  • intersect features
    • use pairwise intersect tool
  • summarize street length for fire companies
• 6-6 using union on neighborhoods and land use features
  • • union tool overlays geometry and attributes of 2 input polygon layers to generate new output polygon layer
  • open tables to study attributes
  • use union on features
  • calculate acreage
  • select and summarize residential land use areas for neighborhoods
• 6-7 using the tabulate intersection tool
  
  • study tracts and fire company polygons
  • use tabulate intersection to apportion the population of persons with disabiltes to fire companies