Month: February 2025

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Address Point

A comprehensive and spatially accurate dataset of all certified addresses within Delaware County, Ohio. This dataset is updated daily and made available on a monthly basis.

Annexation

Tracks changes to municipal boundaries in Delaware County, including annexations and territorial adjustments since 1853. Updates occur as needed when changes happen, with monthly publications.

Building Outline

Outlines the physical structures across Delaware County.

2021 Dataset: Last updated in 2021, with updates occurring as needed.

2023 Dataset: Last updated in 2023, with updates occurring as needed.

Condo

A dataset containing all condominium properties in Delaware County, represented as polygons.

Dedicated Right-of-Way (ROW)

Contains all designated road right-of-way areas in Delaware County. This dataset aligns with parcel data updates and is updated as needed, with monthly publications.

Delaware County Contours

A topographic dataset displaying two-foot elevation contours across the county, based on 2018 survey data.

Delaware County E911 Data

Utilizes the Address Point dataset to determine the closest emergency response location for any given address. This dataset is updated daily and published monthly.

Farm Lot

Identifies the locations of farm lots throughout Delaware County. Updates occur as needed when new surveys are conducted.

GPS Monuments

A record of established GPS control points (monuments) throughout Delaware County, used for geospatial referencing.

• Last updated in 2021, with updates occurring as needed.

Hydrology

Maps major waterways, including rivers, lakes, and streams. The dataset was last enhanced in 2018 and is updated as needed.

Master Street Address Guide (MSAG)

Maintains a record of all official street addresses in Delaware County, along with their respective jurisdictions (cities, townships, and villages). Updates occur as needed.

Map Sheet

Contains all official map sheets for Delaware County.

Municipality

Defines and maintains the boundaries of all municipalities within the county.

Original Township Boundaries

Displays the historical township boundaries before modifications due to tax districts. This dataset remains unchanged over time.

Public Land Survey System (PLSS)

Contains land division information based on public land surveys, including those conducted by the U.S. Military and Virginia Military surveys. Updated as needed, with the latest update on February 28, 2025.

Parcel Data

Includes all land parcel boundaries within Delaware County. Maintained by the Delaware County Auditor’s GIS Office, updated daily, and published monthly.

Voting Precincts

Outlines all voting precincts within Delaware County, maintained by the Board of Elections and updated as needed.

Recorded Documents

A dataset containing points linked to recorded property-related documents within Delaware County. Updated weekly and published monthly.

School Districts

Defines the geographic boundaries of all school districts in Delaware County. Updated as needed.

Street Centerline

Represents the centerline of all public and private roads in Delaware County. Used for transportation planning, emergency response, and accident reporting. Updated daily.

Subdivision

Records all subdivision developments and condominium communities. Updated daily and published monthly.

Survey Data

A dataset showing locations of land surveys conducted throughout Delaware County. Maintained by the Map Department, updated daily, and published monthly.

Tax Districts

Defines tax district boundaries in Delaware County, maintained by the Real Estate Office. Updated as needed.

Township Boundaries

Shows the defined borders of the 19 townships in Delaware County. Updated as needed and published monthly.

Zip Code Data

Represents the ZIP code boundaries within Delaware County, refined using postal and census data.

Address Point: A dataset of all certified addresses in Delaware County, updated daily and published monthly.

Annexation: A record of annexations and boundary changes within Delaware County since 1853, reflecting territorial adjustments. Updated monthly.

Building Outline: A collection of structure outlines throughout Delaware County, with the latest update in 2023.

Condo: A dataset of all condominium-style housing units within Delaware County.

Dedicated Right-of-Way (ROW): Identifies all designated road right-of-way areas within Delaware County.

Delaware County Contours: Displays two-foot elevation contours based on 2018 topographic data, providing a detailed terrain map.

Delaware County E911 Data: Uses address point data for reverse geocoding to determine the closest emergency services location. Updated daily and published monthly to enhance 911 response accuracy.

Farm Lot: A dataset marking farm lot locations within Delaware County.

GPS Monuments: Includes all established GPS monuments in Delaware County, last updated in 2021.

Hydrology: Highlights major waterways, including lakes and rivers, within Delaware County. Updated monthly using LiDAR data.

MSAG (Master Street Address Guide): Contains all street addresses within Delaware County along with their respective jurisdictions (townships, cities, and villages). Updated as necessary.

Map Sheet: A dataset featuring all official map sheets for Delaware County.

Municipality: Defines the boundaries of all municipalities within Delaware County.

Original Township: Displays historical township boundaries prior to modifications caused by tax district changes. This dataset remains static and is not actively updated.

Public Land Survey System (PLSS): Represents the public land survey system used to define land divisions in Delaware County. Updated as needed.

Parcel Data: A dataset containing all parcel lines within Delaware County, maintained by the Delaware County Auditor’s GIS Office. Updated daily and published monthly.

Voting Precincts: Shows the boundaries of all voting precincts within Delaware County, managed by the Board of Elections.

Recorded Documents: A collection of property-related recorded documents for Delaware County.

School Districts: Outlines the boundaries of all school districts within Delaware County.

Street Centerline: Represents the central axis of all public and private roads in Delaware County, used primarily for transportation planning, accident reporting, and emergency response. Updated daily.

Subdivision: Tracks all subdivision and condominium developments in Delaware County. Updated monthly.

Survey Data: A collection of survey results across Delaware County, maintained by the Map Department. Updated daily and published monthly.

Tax Districts: Defines the boundaries of tax districts within Delaware County, managed by the Real Estate Office. Updated as necessary.

Township Boundaries: Depicts the 19 current townships in Delaware County. Updated as needed and published monthly.

Zip Code Data: A dataset of all ZIP codes within Delaware County.

Address Point: A comprehensive dataset of all certified addresses in Delaware County, updated daily and published monthly.

Annexation: Tracks territorial adjustments, including annexations and boundary changes, since 1853. Updated monthly.

Building Outline: Provides outlines of all structures within Delaware County. Last updated in 2023.

Condo: Lists all condominium-style housing units within Delaware County.

Dedicated Right-of-Way (ROW): Represents all designated road right-of-way areas in Delaware County.

Delaware County Contours: Displays two-foot elevation contours derived from 2018 topographic data, offering a detailed view of the county’s terrain.

Delaware County E911 Data: Uses address point data for reverse geocoding to enhance emergency response by identifying the nearest emergency services location. Updated daily and published monthly.

Farm Lot: Identifies farm lots throughout Delaware County.

GPS Monuments: Catalogs all GPS monuments established within Delaware County. Last updated in 2021.

Hydrology: Maps major waterways, including lakes and rivers. Updated monthly using LiDAR data.

MSAG (Master Street Address Guide): Maintains all street addresses and their corresponding jurisdictions (townships, cities, and villages). Updated as needed.

Map Sheet: A complete dataset of official map sheets for Delaware County.

Municipality: Defines the boundaries of all municipalities within Delaware County.

Original Township: Displays historical township boundaries before tax districts altered their shapes. This dataset remains static.

Public Land Survey System (PLSS): Represents the public land survey system used for defining land divisions. Updated as needed.

Parcel Data: Contains all parcel lines, maintained by the Delaware County Auditor’s GIS Office. Updated daily and published monthly.

Voting Precincts: Outlines all voting precincts in Delaware County, maintained by the Board of Elections.

Recorded Documents: A collection of property-related recorded documents for Delaware County.

School Districts: Defines the boundaries of all school districts within Delaware County.

Street Centerline: Represents the center of pavement for all public and private roads. Used for transportation planning, accident reporting, and emergency response. Updated daily.

Subdivision: Records all subdivision and condominium developments. Updated monthly.

Survey Data: Contains survey results across Delaware County, maintained by the Map Department. Updated daily and published monthly.

Tax Districts: Defines tax district boundaries, managed by the Real Estate Office. Updated as needed.

Township Boundaries: Depicts the 19 townships within Delaware County. Updated as needed and published monthly.

Zip Code Data: Provides all ZIP code boundaries within Delaware County.

Address Point

This dataset is a spatially accurate representation of all addresses within Delaware County, Ohio. The database is updated on a daily basis, with the updates being published monthly.

Annexation

This dataset contains all Delaware County, Ohio boundaries, including all annexations and conforming boundaries from 1853 to present day. The dataset is updated on an “as-needed” basis (when an annexation occurs), with the updates being published monthly.

Building Outline 2021

This dataset contains building outlines for all structures within Delaware County. The dataset was last updated in 2021, and is updated on an “as-needed” basis.

Building Outline 2023

This dataset contains building outlines for all structures within Delaware County. The dataset was last updated in 2023, and is updated on an “as-needed” basis.

Condo

This dataset contains polygons for all condominium housing within Delaware County, Ohio.

Dedicated ROW

This dataset contains all lines that have Right-of-Way in Delaware County, Ohio. It coincides with the daily updates of Delaware County’s Parcel data. It is updated on an “as-needed” basis, being published monthly.

Delaware County E911 Data

This dataset utilizes the Address Point dataset in order to geolocate the nearest emergency services location to an address within the county. The dataset is updated on a daily basis, being published monthly.

Farm Lot

This dataset contains all farm lots in Delaware County. It is updated on an “as-needed” basis (when new surveys are taken).

GPS

This dataset contains locations for all GPS Monuments (metal discs that determine longitude and latitude) established in Delaware County, Ohio from 1991 to 1997. It was last updated in 2021, with the dataset being updated on an “as-needed” basis.

Hydrology

This dataset contains all major waterways in Delaware County, Ohio. Enhanced in 2018, the dataset is updated on an “as-needed” basis.

Map Sheet

This dataset contains all map sheets within Delaware County, Ohio.

Original Township

This dataset contains the original boundaries of townships within Delaware County, Ohio, prior to tax districts altering their shapes.

Public Land Survey System (PLSS)

This dataset contains the conclusions from Public Land surveys conducted by the U.S. Military, as well as the Virginia Military survey results. It is updated on an “as-needed” basis, with the most recent update being today (Feb 28, 2025).

Parcel

This dataset contains parcel lines creating distinct land parcels. The dataset is updated on an “as-needed” basis.

Precinct 

This dataset contains voting precinct boundaries in Delaware County, Ohio. It is updated on an “as-needed” basis, being updated by the Delaware County Board of Elections.

Recorded Document

This dataset contains points that are related to recorded documents in Delaware County, Ohio. The documents are typically related to land uses, updated weekly, published monthly.

School District

This dataset contains all boundaries for school districts within Delaware County, Ohio. It is updated on an “as-needed” basis.

Street Centerline

This dataset contains the centerpoint of public and private roads within Delaware County, Ohio. This information is used for things from 911 responses, to appraisal mapping, and even disaster management.

Subdivision

This dataset contains the boundaries for subdivision and condominium communities. It is updated daily, published monthly.

Survey

This dataset is a shapefile, that contains representations of where land surveys have taken place within Delaware County, Ohio. It is updated daily, being published monthly.

Tax District

This dataset contains the boundaries of all tax districts within Delaware County, Ohio. It is updated on an “as-needed” basis, being published monthly.

Township

This dataset contains the boundaries of all townships located within Delaware County, Ohio. It is updated on an “as-needed” basis, being published monthly.

Zip Code

This dataset contains the boundaries of all zip codes within Delaware County, Ohio. The boundaries have been “cleaned-up” utilizing postal data as well as census data.

Chapter 7: In the first tutorial I was able to manipulate the polygons within a campus map, using the editing features. This was helpful because I had not yet used the editing frames, and I had to make sure to be saving each edit after I made it. Tutorial 2, went more in depth with the features used to create and manipulate polygons within maps. I was able to create my own polygons and get a better understanding of the types of polygons that are useful in this kind of mapping. Tutorial 3 taught me how to smooth layers, it was helpful because I was able to still see the underlying mapped features but have a translucent marker over top to designate the boundaries of the noted features. I hit a snag with the fourth tutorial because gis for some ridiculous reason would not allow me to select the polygon layer which therefore meant I could not finish the tutorial because I could not manipulate the layer in any way but it was interesting to learn about how to import this layer of polygons into an existing map, and I hope in the future GIS will work properly so I can get the polygon to layer over map properly.

Chapter 8: The first tutorial helped me plot a large data set on the map, then I was able to make sure every data point was properly matched. This is helpful because in most cases when a vast data set is being placed in a mapping system there is bound to be mistakes or mix ups but learning how to find and correct those within GIS is important to making sure I know how to properly create and use the mapping I am learning. I was also able to use the collect events feature to quickly create a map that visually shows the frequency of events relative to location on the map. This was significantly faster than other methods the tutorials have used in the past to create maps like this. I continued this work in Tutorial 2, where I was able to again use the attribute table to determine the incomplete data in the set. I was also able to use street addresses for attendees and put them on a map which clearly has a cluster in the center, which is useful to know for the organizers of this hypothetical event, and is how these skills can be applied to the real world.

Chapter 9: From the first tutorial I learned how to create buffers and have the mapping system count other mapped features within those buffers. I was able to count how many kids were living within certain distances from a pool, and this could be repeated in many applications, it would be useful to many types of research that might actually be done. The second tutorial expanded on this by teaching me how to obtain more statistics from within these buffer areas which is helpful for more complete data analysis. The third tutorial helped me determine which pools were open, and made a map based on the proximity of the commute to an open pool. It also helped me use the data from this map to count the number of pool tag holders in these regions. This is more data analysis that is helpful for real world applications, not just with pools but with any resource, and can even be applied to animal populations. Tutorial 4 taught me how to use the data and demand tools to determine which pools maximize attendance, this is also an interesting concept to use for real world applications. Tutorial 5 taught me how to create clusters of data points, differentiate their statistics, and create separate labels and map symbols for those groups.

Chapter 10: Tutorial 1 was informative, it taught me how to use, manipulate, and extract the raster data from the mapping system. This helped me to visualize data sets and to integrate two different raster layers by changing the transparency of a layer. This will be helpful in the future when trying to create a multifaceted map that can display more than one type of data/information at the same time. In tutorial 2, I used some of the same skills as well as many I learned previously in order to create a density/heat map which was very interesting. Previously each of the skills that was used here had been used in a different capacity but bringing them all together to create this map really helped me to see the usefulness of some of the skills I have learned in earlier chapters of this course. Tutorial 3 was an even more immersive use of these skills bringing together what was learned in tutorial 2 with more of my past skills and it really made me feel good to make this map almost completely on my own.

Chapter 11: Tutorial 1 really helped me to get oriented in the 3D global view of the mapping interface, with a brief overview of shortcuts and how to manipulate the view point and manipulate the base layers. Tutorial 2 helped me learn to create a TIN layer and my own local view of the 3D map of Pittsburgh, which made the use of a 3D map make a little bit more sense. Tutorial 3 taught me how to add and enable and turn off z-enabled features to my 3D map which was interesting, and I know it will eventually come in handy for something other than trees in a park. Tutorial 4 got more in depth into the practical uses and functions of the 3D mapping interface. It brought in the Raster skills learned last chapter and used them in a 3D map this time. I learned how to manipulate a lot of the different features of the 3D map and use various different types of data to get different views. Both the fifth and sixth tutorials centered around using the 3D interface to add three dimensional shapes (buildings) onto the map in progressive detail. And finally, in tutorial 7 it culminated into a 3D animation which I think will be less useful to me in the future as it would be to someone in more of a city planning or architectural career path.

Address Point: Represents all certified addresses in Delaware County. Updated daily and published monthly.

Annexation: Tracks annexations and boundary changes within Delaware County since 1853. Annexation in this context refers to territorial adjustments, and the dataset is updated monthly.

Building Outline: Contains outlines of all structures within Delaware County. The dataset was last updated in 2023.

Condo: Includes all condominium-style housing within Delaware County.

Dedicated Right-of-Way (ROW): Represents all designated road right-of-way areas within Delaware County.

Delaware County Contours: Depicts two-foot elevation contours derived from 2018 topographic data, providing a detailed view of the county’s terrain.

Delaware County E911 Data: Utilizes address point data for reverse geocoding to determine the nearest emergency services location. This dataset is updated daily and published monthly, improving 911 response efficiency.

Farm Lot: Identifies farm lots within Delaware County.

GPS Monuments: Includes all GPS monuments established in Delaware County. Last updated in 2021.

Hydrology: Displays major waterways, including lakes and rivers, throughout Delaware County. Updated monthly using LiDAR data.

MSAG (Master Street Address Guide): Contains all street addresses within Delaware County and their corresponding jurisdictions (townships, cities, and villages). Updated as needed.

Map Sheet: Comprehensive dataset containing all official map sheets for Delaware County.

Municipality: Identifies the boundaries of all municipalities within Delaware County.

Original Township: Shows historical township boundaries before tax districts altered their shapes. This dataset is static and not actively updated.

Public Land Survey System (PLSS): Displays public land survey used for defining land divisions in Delaware County. Updated as needed.

Parcel Data: Contains all parcel lines within Delaware County. These are maintained by the Delaware County Auditor’s GIS Office, updated daily, and published monthly.

Voting Precincts: Outlines all voting precincts in Delaware County, maintained by the Board of Elections.

Recorded Documents: A collection of recorded documents from Delaware County. Used for locating property-related documents.

School Districts: Defines the boundaries of all school districts within Delaware County.

Street Centerline: Represents the center of pavement for all public and private roads in Delaware County. Primarily used for transportation planning, accident reporting, and emergency response. Updated daily.

Subdivision: Records all subdivision and condominium developments in Delaware County. Updated monthly.

Survey Data: Represents survey results across Delaware County, maintained by the Map Department. Updated daily and published monthly.

Tax Districts: Defines tax district boundaries in Delaware County, managed by the Real Estate Office. Updated as needed.

Township Boundaries: Depicts the 19 current townships that make up Delaware County. Updated as needed and published monthly.

Zip Code Data: Contains all ZIP codes within Delaware County.

Chapter 9

The tables were not working in chapter 9-3 when I tried to to join “service area” and “pool tags”. I was also unable to make the scatter plot. I moved on to 9-4.evrything else in this chapter went well. Super fun!

 

Chapter 10 

10-1 & 2 were fine in 10-3, I was unable to make the expression ZFHHChld=(!FHHChildren!-45.20/66.8. I kept going adn had an error in my model, but I think I fixed it, maybe? The poverty index wasnt showing i kept going adn made it to chapter 11.

Chapter 11 

Chapter 11 was fine, it was kinda crazy with all of the 3D things. Had some issues moving stuff around it was kind of hard to get the map to move in a way to see what you wanted to see. But overall a good chapter.

Address Point: This represents the unique addresses of every place in Delaware County, and is based on the State of Ohio Location Based Response System. It is used to help optimize emergency response.

Annexation: This represents the annexations in Delaware County from 1853 to present day. It is updated monthly.

Building Outline 2021: This is the older building outline data for Delaware County. It was last updated in 2023.

Building Outline 2023: This represents all the building outlines in Delaware County, and was last updated in 2024.

Condo: This data set represents all condominium style housing in Delaware County. It is based on data from the Delaware County Recorder Office.

Dedicated ROW: This represents the right of way data in Delaware County. It is line data created based on the Delaware parcel records.

Delaware County Contours: This represents the two foot contours in Delaware County and it is from 2018.

Delaware County E911 Data: This represents data from the location based response system for Delaware County. It is primarily used to help 911 operators be more efficient, and is updated daily.

Farm Lot: This represents the farm areas in Delaware County. It uses US Military data the get the data.

GPS: This dataset represents all the GPS monuments in Delaware County, from 1991-1997. It was last updated in 2021.

Hydrology: This dataset shows the major water ways in Delaware County, including lake and rivers. It is put together using LiDAR data and is updated monthly.

MSAG: This data set contains all street addresses and how they fit into jurisdictions, such as townships. It is updated as needed.

Map Sheet: The map sheet is a dataset that contains all the map sheets of Delaware County.

Municipality: This dataset shows all the municipalities in Delaware County.

Original Township: This dataset shows the original township borders in Delaware County. These are no longer in effect, and as such are not updated.

PLSS: This dataset shows the public land survey system. It is created using military data, and is updated as needed.

Parcel: This dataset contains all parcel data in Delaware County. It is created by the Delaware County Auditor’s GIS Office, and is updated daily and published monthly.

Precinct: This dataset represents the voting precincts in Delaware County. It is updated based on the Delaware County Board of Elections.

Recorded Document: This dataset represents all recorded documents in Delaware County. Its main purpose is to assist in finding documents.

School District: The school district represents all the school districts in Delaware County, and is made based on the Delaware County Auditor’s parcel records.

Street Centerline: This data set represents all roads and streets in Delaware County. It is updated daily and is used for things such as accident reporting and disaster management.

Subdivision: This dataset represents the subdivisions and condos in Delaware County. It is made based on the Delaware County Recorder’s Office and updates monthly.

Survey: This dataset represents the land survey results of Delaware County. It is overseen by the Map Department, updated daily, and published monthly.

Tax District: This dataset represents the tax districts found in Delaware County. It is created by the Real Estate Office and is updated as needed.

Township: This dataset represents the current townships in Delaware County. It is updated as needed and published monthly.

Zip Code: The zip code data is pretty self-explanatory. It is a collection of all the zip codes located in Delaware County, and is based on census data.

1. Zip Codes

This dataset maps all zip codes within Delaware County, carefully refined through census data and postal records. 

2. School Districts

A spatial representation of school district boundaries based on auditor parcel records. 

3. Building Outlines (2023)

This dataset contains the most recent building footprint data, offering insights into urban development and property mapping. 

4. Parcels

Cadastral parcel lines defining property boundaries, maintained daily.

5. Street Centerlines

This dataset maps the center of public and private roads, designed for 911 emergency response, accident reporting, and transportation planning. 

6. Condo & Subdivision Boundaries

The condo dataset outlines recorded condominium properties, while the subdivision dataset includes all recorded housing developments. 

7. Address Points

This dataset provides accurate placement of addresses within parcels, supporting geocoding, 911 services, and disaster response. 

8. Recorded Documents

This dataset includes survey plats, annexations, and legal documents related to land use changes. 

9. Dedicated Right-of-Way (ROW)

Tracks public roads and utility corridors, showing which land is set aside for public infrastructure.]

10. E911 Data

This dataset supports emergency response services, ensuring that addresses are accurately placed for quick location tracking. 

11. Hydrology

Maps all major waterways, rivers, and streams within Delaware County, enhanced using LiDAR data. .

12. GPS Monuments

A dataset identifying surveyed GPS reference points from 1991 and 1997. 

13. Farm Lots & Annexations

The farm lot dataset maps historical agricultural land divisions, while the annexation dataset tracks boundary changes since 1853. 

14. Tax Districts

This dataset defines taxation zones, determining property tax rates based on location.

Chapter 9

Chapter 9 focuses on spatial analysis techniques, providing hands-on experience with proximity analysis, service areas, facility location modeling, and cluster detection. The service area analysis with Network Analyst caught my attention too—it made me think about how healthcare access in affected communities could be mapped and improved. The facility location modeling was cool because it helps optimize the placement of cleanup or medical facilities, something I hadn’t considered before.

Chapter 10

This chapter introduced me to raster data processing, which felt like a whole new way of thinking about GIS. I found kernel density mapping especially interesting—it’s a great way to visualize concentration patterns. The risk index modeling was another highlight because it combines multiple factors into a single predictive map. I also liked how raster data allows for continuous data representation, making it ideal for environmental applications like pollution spread or elevation modeling.

 

Chapter 11

This was probably the most visually exciting chapter so far. Seeing geographic data in 3D made patterns much more obvious, especially when extruding data to show differences in contamination or population density. I really enjoyed creating local scenes because it felt more immersive. The line-of-sight analysis was a cool concept.  Overall, this chapter made me realize how 3D GIS can make spatial data more intuitive.