Accessing and Viewing Minnesota LiDAR Data Online Tim Loesch MNIT Services Minnesota Department of Natural Resources Mn GISLIS Conference October 10 2013 Background Introducing the MnTOPO Elevation Data Portal ID: 589801
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MnTOPO – A place to view, print, and download LiDAR Elevation Data
Accessing and Viewing Minnesota LiDAR Data On-line
Tim Loesch
MN.IT Services @
Minnesota Department of Natural Resources
Mn
GIS/LIS Conference
October 10, 2013Slide2
Background
Introducing the MnTOPO Elevation Data PortalPortal Capabilities – what it is, and what it is not….
Downloading Data
Options and formats…..Questions and Answers….
MnTOPO Elevation PortalSlide3
Minnesota Elevation Mapping Project
High accuracy elevation data Statewide AvailabilityOpen Data – Available to everyone
Common format and structure
Fully documented
MnTOPO
Elevation PortalSlide4
Funded by a variety of sourcesMinnesota Clean Water Legacy
State of MinnesotaFederal Government (USGS, NRCS, COE)
Minnesota Counties and Cities
State of North Dakota
MnTOPO Elevation PortalSlide5
MnTOPO Elevation Portal
15 different collects
2005 – 2012Slide6
Point spacing
0.25 – 8 pts/meter
MnTOPO Elevation PortalSlide7
The last few years…Project Management
Contracts – 6Amendments - 5Inter-agency agreements (2)
Grants (2)
Joint Powers Agreements (4)
MnTOPO Elevation Portal
MESlide8
The last few y
ears - Distribution and Access FTP access is availableGood for large downloads
Not ideal for all users
MnTOPO Elevation Portal
YOU
I just want the damn data!Slide9
MnTOPO - On-line access to Elevation
data
MnTOPO Elevation Portal
http://arcgis.dnr.state.mn.us/gis/mntopoSlide10
MnTOPO - On-line access to Elevation dataCollaborative effort between DNR, MN.IT @ DNR and MnGEO
@ DNRApplication coding and hosting
Map and data services for viewing
MnGEO Data processing and storage
Bundling and
fullfillment
of data packages
MnTOPO Elevation PortalSlide11
MnTOPO - On-line access to Elevation dataBrowser Based Application
MnTOPO Elevation PortalSlide12
MnTOPO - On-line access to Elevation data
GPS enabled
MnTOPO Elevation PortalSlide13
MnTOPO - On-line access to Elevation data
Mobile Device ready
MnTOPO Elevation PortalSlide14
MnTOPO – On-line access to Elevation data
MnTOPO Elevation Portal
Map Display
Backgrounds
Basemap
(ESRI/BING)
Air photos (ESRI/BING)
Terrain – Colored DEM over the top of
hillshade
Hillshade
Overlays
2, 10, 50
ft
Contours
LiDAR Flight Lines
FEMA Flood DataSlide15
MnTOPO - On-line access to Elevation data
Map DisplayElevation data tile-cached for speedWeb Mercator projection
1:2,257 – 1:4,622,324 scales
These factors affect printing……..
MnTOPO Elevation PortalSlide16
MnTOPO - On-line access to Elevation data
SearchingUses BING Search EngineAddresses, place names, coordinates
MnTOPO Elevation PortalSlide17
MnTOPO – On-line access to Elevation data
MnTOPO Elevation Portal
Transparency SlidersSlide18
MnTOPO - On-line access to Elevation dataRetrieve Elevation Information
MnTOPO Elevation PortalSlide19
MnTOPO - On-line access to Elevation data
Create PDF Maps
MnTOPO Elevation PortalSlide20
MnTOPO - On-line access to Elevation dataDownload Data
Draw a polygonSelect productsSelect Product Type
Open
Shapefile (vector)Binary (raster)
LAS/LAZ
ESRI
Geodatabase
LAS files
MnTOPO Elevation PortalSlide21
MnTOPO - On-line access to Elevation dataDownload
Data – other things to know…UTM Zone 15, NAD83Raster and Vector data are merged/
mosaiced
LAS data is stored as compressed LAZ filesLAS data is NOT merged
Metadata is included
10gb download limit
MnTOPO Elevation PortalSlide22
MnTOPO - On-line access to Elevation
dataWhat it is not….MnTOPO is not a GIS System
Can’t do precise zooms due to Tile-Cache limitations
Is not meant to provide high accuracy profiles required by some applications
Cannot zoom in past 1:2,257
Overlays and backgrounds are limited
Internet printing is what it is……
MnTOPO Elevation PortalSlide23
MnTOPO - On-line access to Elevation
dataFuture PlansAdd additional derived elevation products to display
Additional Overlays (watersheds, parcels,
etc)Improve printing predictability
Profiles –
Upload shapefiles for profiles
Profiles are graphics with editable vertices
Augment
s
earch criteria –
PLS
MnTOPO Elevation PortalSlide24
Credits……Sean Vaughn – Subject Matter Expert
Pete Olson – app developerNancy Rader – documentation, guidance and supportBrent Lund – development and project management
Jim Dickerson – data processing
Jeremy Moore – interface development
Mike Tronrud – Tile-cache development
Zeb Thomas – data maintenance
Fred Logman – project management
MnTOPO Elevation PortalSlide25
http://arcgis.dnr.state.mn.us/gis/mntopo
MnTOPO Elevation Portal