GIS Fun with Anna

Module 9 spatial analyst

2008-04-28T15:32:00.005-04:00

This was a difficult one for me. I learned that spatial analyst works really well with raster data to show and analyze data sets. You can create hillshades, slopes, and wieght the importants of the data that you are looking at to calculate new information

It's an awesome tool

Module 9

2008-04-28T15:30:00.002-04:00

Module 10 Hillshade

2008-04-23T15:39:00.003-04:00

Module 10 Slope

2008-04-23T15:39:00.001-04:00

Module 10 Aspect

2008-04-23T15:35:00.002-04:00

Using the spatial analyst add on, I took a DEM (Digital Elevation Model) of Haywood County and I added the aspect, or direction of the slope to the model. I simplified the slope in this case to North and south slopes to make it a little bit easier to read.

Module 10 Aspect

2008-04-23T15:34:00.001-04:00

Practice Quiz 2

2008-04-23T15:07:00.001-04:00

I could have taken out the parcel layer on the locater map, but I liked the variation in color, so I kept it. I think it would look good on a blotter.

Practice Quiz 2

2008-04-23T15:02:00.002-04:00

This was a lot of fun, very basic clipping and map making

Buffers

2008-04-02T16:04:00.001-04:00

Buffers: Buffers can be drawn at a constant distance around every feature or at a distance that varies according to attribute values. If features are close together, their buffers may overlap. You can preserve the overlaps or remove them.

Note: When using the Dissolve ALL Function with a buffer. Buffers created with the dissolve All option form a single feature called a multi part polygon. AKA the attributes go to the standard 4 objectid, shape, distance, shape length

Overlay

2008-04-02T15:12:00.001-04:00

OverLay: When you are interested in combining data sets that overlap, overlaying is the key. You can overlay by intersecting, which preserves the area that is common to both data sets. You can also use a union that preserves everything in both areas

Chapter 11 D

2008-04-02T15:07:00.003-04:00

To Create a New Layer

2008-04-02T15:06:00.002-04:00

To Create a New Layer: (you could go to selection menu –Set Selectable Layers, then on the Tools toolbar click the icon to ‘Select Features.’ And click on the one you want, then right click on the layer Selection- create layer from selected features.) TADA

Clipping

2008-04-02T15:06:00.001-04:00

Clipping: Clipping trims features in one layer at the boundaries of features in another layer. This lets you work with layers that have a common spatial extent, making it easier to navigate a map.
To Clip a spatial attribute based within a layer you must select that attribute. I first created a new layer.
To Create a New Layer: (you could go to selection menu –Set Selectable Layers, then on the Tools toolbar click the icon to ‘Select Features.’ And click on the one you want, then right click on the layer Selection- create layer from selected features.) TADA
Then go to Arc Toolbox - Extract –Clip – Remember you are Clipping one layer based on another, the input is the layer that will be changed based on the output layer TADA

Chapter 11C

2008-04-02T15:05:00.000-04:00

TADA These are my two appended layers

Chapter 11B

2008-04-02T14:29:00.000-04:00

Dissolve

2008-04-02T14:28:00.000-04:00

Dissolve: A dissolve creates a new data set where features in an input table that have the same value for a specified attribute become a specified feature.
Go to: Arc Toolbox – Generalization – Dissolve – Input Features (the input layer to Dissolve) Then select the attribute you would like to aggregate

Chapter 11A

2008-04-02T14:25:00.002-04:00

Using a dissolve I combined data based on similar attributes

Module 6 Part Duo

2008-04-02T14:13:00.005-04:00

I thought this moment would never come. It's amazing how much time goes into making the data. It takes a special person.

Module 6 Georeferencing and snapping

2008-04-02T12:29:00.002-04:00

Snapping (here we are making a vector layer of trail data)
Are you still with me? Ok, so snapping is a great way to georeference. So, you have your known and unknown data, right? Using the editing tool bar click the drop down to ‘start editing’note: you can only edit one data frame so if given the choice click on the one you want to edit. Using the same drop down set your ‘snapping,’ click on what you want to snap, in our case it is roads and trails. Now you want to use the edit tool to (Task) create a new feature in this case, and here we are tracing along the lines of the trails- The goal here is to make a vector layer of trail data. You can double click when you're finished and the feature will highlight. Then you can go into the attribute table and add data.
Trace tool Will allow you to trace along a feature that is highlighted, exactly copying it
How to highlight a feature click on it with your edit tool

Module 6 Part 2 Georeferencing

2008-04-02T12:03:00.005-04:00

Georeferencing Part 2
What kind of coordinate system, what is the map projection, what spatial reference that our data is in? Go to Arc Catalog- file folder- metadata
Or Contents – right click properties- XY Coordinate System You can check out the projection.
Now that the trail map has been georeferenced, the next step is to use it to create a vector layer of the trails complete with attribute information.
So we go to the Bent Creek Folder and Right Click New- New File Geodatabase
Then we need to create a new feature class for the database so we right click on the geodatabase create a new feature class. Here you specify what kind of coordinate system your data is going to be in.

Georeferencing Part 1

2008-03-31T13:51:00.003-04:00

Georeferencing Part 1

2008-03-31T13:50:00.001-04:00

Georeferencing Part 1
Using the View drop down and going to Toolbars- Georeferencing toolbar. This allows us to assign real world coordinates to our raster data, to a image that does not have real world coordinates, using control points.
Starting in the display window layer of our real world coordinates we ‘fit to display’ our new data to display an overlap. Here we can reference non real world to real world starting with the unknown using control points. You have to use more control points if your map is not very accurate.
We create a world file by Updating Georeferencing

Chapter 10

2008-03-19T15:40:00.003-04:00

Here I am selection attributes by location, looking for the best spot to place my client's new business. We want it to be close to a business center, and because it's a pricey shop we need it to be in an area with a high density of people with a alot of money. The second picture showsthe final location chosen.

Chapter 9

2008-03-19T15:33:00.002-04:00

This map focuses on abandoned pit mines that have high concentrations of heavy metals that could cause concerns about safety. I have identifies these sites based on the actoin required to clean the sites. I have used a 'join' based on the common attribute feild of IDNumber to add more data.

Chapter 8

2008-03-19T15:24:00.005-04:00

This was an introduction to selecting by attributes, it's some pretty interesting stuff. So, you are working with a client who is interested in three bedroom houses that are for sale on corner plots. One of the pictures shows all the plots that are for sale selected using a select by location status = y Yes they are for sale

Google Map

2008-02-15T09:59:00.000-05:00

View Larger Map

Tiger Conservation

2008-02-11T16:24:00.001-05:00

Another World

2008-02-06T15:27:00.000-05:00

This is the Sinusoidal Projection. It shows relative sizes accurately but distorts shape and direction.

The Cube World

2008-02-06T15:23:00.001-05:00

This map plays off of the
Fuller example, except it
uses a cube as a base.

mwrh... yeah it's kind of
strange

A Different World Perspective

2008-02-06T15:19:00.001-05:00

This is Fuller's Projection of the Earth. He takes the shape of the Earth, and through a low distortion transformation turns a spherical surface into that of a flat one.

Discussion Questions

2008-02-06T13:20:00.001-05:00

Should you define a coordinate system when you don’t know its origin? What kinds of problems could occur?

Walk me though how she narrowed down her search in defining her data for Ohio.

Give me an example of when you would use NAD83 and WTD84 interchangeably and when should you not. Explain.

What is the difference between Coordinate systems and special reference?

Chapter 13 Arc Gis

2008-02-06T13:02:00.000-05:00

Chapter 4 Map

2008-02-04T12:41:00.000-05:00

This shows a layout view of the area of
disappearance on the Earhart path. We
went into ArcCatalog and dragged the
polygon file on to our World map. Then we
inserted a new data frame using the insert
drop-down, and moved two more shape files
showing the area of disappearance and the
sea floor gradient, and added the flight data.

Swine Waste Eastern NC

2008-01-30T11:19:00.000-05:00

This map is so good looking, I love it.
I think my biggest challenge in 121
will be constantly coming up with
ideas for what information I want
to portray to the viewer. I struggled
with that in this map, and I think
coming up with ideas that can be
enhanced when thinking about
them spatially will be helpful.

Map 1 Blue Ridge Motel

2008-01-30T11:10:00.000-05:00

Map 2 3b

2008-01-30T10:48:00.001-05:00

This is a closeup of Earhart's Possible Paths
after she left Papua New Guinea

First Map 3a

2008-01-30T10:46:00.000-05:00

This outlines our first map in GIS 111.
We are looking at Earhart's trip around the world.

Here we go

2008-01-24T21:11:00.002-05:00

I'm very excited about this starting GIS class. The more I read about it the more I'm enthralled with the software.

Welcome to Cartography

2008-01-24T21:02:00.000-05:00

I seem to be getting a slow start so far. I seem to have deleted my first map lol. I'm working on opening the unzipped files in ArcView , and having a little trouble. It's all coming along, though. Land ho!

The Begining

2008-01-23T12:33:00.000-05:00

Welcome to my blog spot!

This blog spot is aimed at helping me organize my Geographical Information Systems notes, as I embark on a journey through GIS Intro and Cartography at AB Tech.

A little background, I am a recent UNC Asheville graduate student with a BS in Environmental Management and Policy, Minor in Economics. As a student I worked on many environmental advocacy projects. In my last semester I co-founded and directed the new Student Environmental Center at UNC Asheville, that is now located in the Highsmith Uviversity Union. The center serves to educate the campus community on environmental issues through community-based social marketing, energy conservation and efficiency programs while working with state and local governments to better meet their sustainability goals.

I hope to be a part of the solution to Climate Change with a municipality, government, or private industry, as our choices will affect all life on Earth.