1 / 18

How to Make a Good Insect Specimen label …

How to Make a Good Insect Specimen label …. … and why. Digital Specimen Data. Wave of the future Specimen labels = data sink (relatively primitive to get that data, borrow specimens, visit collections, etc.)

charles-porter
Télécharger la présentation

How to Make a Good Insect Specimen label …

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How to Make a Good Insect Specimen label … … and why

  2. Digital Specimen Data • Wave of the future • Specimen labels = data sink (relatively primitive to get that data, borrow specimens, visit collections, etc.) • Specimen labels transformed to digital format = data that can be used by the global community for many uses, some we have yet to envision

  3. 3 main concepts Projection Datum Coordinate system Geographical Concepts

  4. What projections do Rectangular projection Tissot’s Indicatrix of distortion

  5. Geographical Concepts: Datum

  6. Common Datums NAD27 (North American Datum): system derived from land-based surveys, using Clarke 1886 ellipsoid NAD83: satellite-based system using the Earth’s center as a reference point; eventually adopted as GRS80 (Geodetic Ref. System 1980) WGS84 (World Geodetic System 1984): mathematically refined GRS80 used by the US military and default for GPS For most uses, NAD83, GRS80, WGS84 are equivalent Geographical Concepts: Datums

  7. Coordinate Systems • Degrees, minutes, seconds 39°25’06”N, 92°26’18”W • Degrees, decimal minutes • 39°25.1016’N, 92°26.2942’W • Decimal degrees *** use this!! • 39.41837°, -92.43824° N = +, S = -, E = +, W = -

  8. What is an acceptable georeference? What is a Georeference? Placing a spot on a map Point: A numerical description of a place that can be mapped, and…Extent: that describes the spatial extent of a locality (or collecting event), and … Uncertainty: its associated uncertainties.

  9. Insect Label: low vs. high quality 1 mi. E Moberly Randolph Co., Mo. July 4-5, 1972 Coll. E. G. Riley Old style – w/o georeference single label USA: MO: Randolph Co. 1 mi. E Moberly, Hwy. 24 39.44929°N, 92.40219°W (WGS84), +/- 200m Modern style – includes georeference Often need a double decker (= two labels/spec.) Two labels vs. single label: Pro: keeps footprint of label small (4 or 5 lines) Con: twice the work cutting and placing VII-4-5-1972, E. G. Riley UV light, secondary growth oak-hickory forest

  10. Common Georeferencing Practices:or, … what will happen to locality data from your old-style labels • Geolocate • Used for locating points and giving uncertainties, editing those points and uncertainties, finding new points from known points • Google Earth / Google Maps / GPS / paper maps, etc. • Used for locating points • Georeference calculator • Used for calculating uncertainties from known points via recommended “best practices” for particular locality types (named place, offset-heading, etc.) Demonstrate with examples: Point –radius method

  11. Out-Put from Geolocate Search

  12. Geolocate results for … Moberly, MO 1 mi. E Moberly, MO * Note: Uncertainty resized to polygon

  13. Output from Georef calculator forpoint at “1 mi. E of Moberly on Hwy. 24: Randolph Co., Missouri” • 39.449941 lat • -92.406406 lon • 7225 • (WGS84) World Geodetic System 1984 datum • decimal degrees • 3.98237 • 4.489 mi. = maximum uncertainty radius (= ½ of linear extent) ** Note that collecting event assumed to have taken place within a ca. 9-mile wide circle • 1 mi • 0.00001 degrees

  14. Geolocate vs. Good Label USA: MO: Randolph Co. 1 mi. E Moberly, Hwy. 24 39.44929°N, 92.40219°W (WGS84), +/- 200m 1 mi. E Moberly, Hwy. 24, MO

  15. Google Earth view

  16. Suggested Protocol forPreparing Good Labels • Take GPS reading in field (especially if an obscure locality with poor landmarks) • Run GPS coordinates in Google Earth / Google Maps to relocate point at middle of extent of the collecting event (CE). • Calculate maximum uncertainty radius of CE (use ruler in Google Earth, etc.) • Record coordinate source datum (GWS84)

  17. Suggested Protocol forPreparing Good Labels, con’t. • Review how to use a GPS (set datum, record GPS model etc, + GPS error with each waypoint) • Review how to take distance measurements using GoogleEarth and GoogleMaps • Create master copy of CE label (MS Word). • Cut coordinates from typed labels and paste into Google Earth for verification: must double check • Review how to format labels (font size, line spacing, etc.) for printing in MS Word. • Review need for quality paper & printer

More Related