Landsat 7 Scene Selection Strategy Based on Seasonal Greenness of Land Cover Type

Landsat 7 ETM+ scene selection for MRLC 2000 can be improved based on information on land cover characteristics and vegetation phenology.

Such information can be derived from the multi-temporal AVHRR data (e.g. Loveland and Belward, 1997, Reed et al., 1994).

Using temporal AVHRR NDVI greenness data to aid Landsat 7 scene selection for MRLC 2000. A scene selection strategy can be established for each mapping zone (or path/row). The methodology provides a consistent framework across the nation to populate the Landsat 7 imagery.

The AVHRR data used in this study are from 1994-1998. The data have been smoothed to reduce cloud effect (Reed, 1994).

Land cover data used to stratify within each mapping zone are from the National Land Cover Data (NLCD) developed from the MRLC 1990 project.

Mapping zone 22 (E NE and KS)

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biweek period

ND

VI

(Sc

ale

d)

row crop

grasslands

smallgrainshay/pasture

decid.forest

Path 28 Row 33 (KS)

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ce

Path 28 Row 33 (KS)

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Biweek period

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d N

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grasslands

row crops

pasture/hay

small grains

Selection criteria: 1. Capture major vegetation phenology (leaf-on and leaf-off, peak greenness)2. Maximize separation among dominant land cover types.3. Select up to 3 scenes over a growing season for each mapping zone. First scene: July-August (15-16th biweek period), near peak greenness and distinct difference in greenness among most land cover types. Second Scene: April (8-9th biweek period), leaf-off before peak greenness (except small grains)

large greenness difference between small grains and other land cover types. Third scene: Sept.-Oct. (20-21th biweek period), leaf-off after peak greenness.

Mapping zone 9 (AZ and NM Mountains)

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biweek period

ND

VI

(Sc

ale

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shrubland

grasslands

bare rock

mixedforest

Mapping zone 9 (AZ and NM Mountains)

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1 4 7

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biweek period

ND

VI

(Sc

ale

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shrubland

grasslands

bare rock

mixedforest

Mapping zone 21 (E. OH and W. PA)

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biweek period

ND

VI

(Sc

ale

d)

decid.foresthay/pasture

row crops

residential

woodywetland

Mapping zone 21 (E. OH and W. PA)

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ND

VI

(Sc

ale

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decid.foresthay/pasture

row crops

residential

woodywetland

Mapping zone 63 (SE GA and N FL)

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ND

VI

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evergreenforest

row crops

woodywetland

transitional

Mapping zone 63 (SE GA and N FL)

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ND

VI

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ale

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evergreenforest

row crops

woodywetland

transitional

Mapping zone 19 (Sierra Neveda)

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1 4 7

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ND

VI

(Sc

ale

d) mixed

forestshrubland

grasslands

bare rock

decid.forestevergreenforest

Mapping zone 19 (Sierra Neveda)

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1 4 7

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biweek period

ND

VI

(Sc

ale

d) mixed

forestshrubland

grasslands

bare rock

decid.forestevergreenforest

Mapping zone 29 (S. and C. CA Plains and Hills)

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biweek period

ND

VI

(Sc

ale

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grasslands

shrubland

evergreen

residential

row crops

hay/pasture

Mapping zone 29 (S. and C. CA Plains and Hills)

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ND

VI

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ale

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grasslands

shrubland

evergreen

residential

row crops

hay/pasture

Mapping zone 17 (S. ID and N. NV)

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VI

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shrubland

grasslands

row crops

pasture/hay

bare rock

Mapping zone 17 (S. ID and N. NV)

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1 4 7

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ND

VI

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shrubland

grasslands

row crops

pasture/hay

bare rock

Mapping zone 3 (Eastern SD)

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1 4 7

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biweek period

ND

VI

(Sc

ale

d)

row crops

pasture/hay

grasslands

samllgrains

deciduousforest

Mapping zone 3 (Eastern SD)

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1 4 7

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biweek period

ND

VI

(Sc

ale

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row crops

pasture/hay

grasslands

samllgrains

deciduousforest

Mapping zone 22 (E NE and KS)

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ND

VI

(Sc

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row crop

grasslands

smallgrainshay/pasture

decid.forest

Mapping zone 22 (E NE and KS)

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160

1 4 7

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biweek period

ND

VI

(Sc

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row crop

grasslands

smallgrainshay/pasture

decid.forest

map zone Location early season(optimal) month_1 (mean) peak (optimal time) month_2 (mean)late season(optimal time)month_3 (mean)1 WA and NE OR Feb 26 thr. Apr. 23 3 July 17 thr. Sept. 11 8 Oct 10 thr. Nov 20 112 coastal OR Feb 1 thr Mar 30 3 June 5 thr July 30 7 Sep 26 thr Nov 6 103 N coastal CA Feb 26 thr Apr 23 3 June 19 thr Aug. 13 7 Oct 10 thr Dec 4 114 S and C CA Feb 26 thr Apr 23 3 June 5 thr July 30 7 Oct 10 thr Dec 4 115 C. valley CA Feb 12 thr Apr 8 3 July 3 thr Aug 27 7 Dec 5 thr. Jan 28 16 Sierra NV March 26 thr June 4 5 Aug 14 thr Oct 9 9 Dec 5 thr. Jan 28 17 N CA & C OR Mar 25 thr May 7 4 June 5 thr Aug 13 7 Aug 14 thr Nov 6 108 SE WA & NE OR Mar 26 thr May 21 4 May 22 thr July 2 6 Aug 14 thr Oct 9 99 NE WA Feb 26 thr Mar 25 3 May 22 thr July 30 6 Aug 14 thr Sep 25 9

10 Western ID Feb 26 thr Mar 25 3 Jun 19 thr Aug 13 7 Aug 14 thr Sep 30 911 N. NV Apr 24 to June 4 5 June 5 thr July 30 6 Sep 12 thr Oct 23 1012 W. central NV May 8 thr June 18 6 June 19 thr Aug 13 7 Aug 28 thr Oct 23 913 S NV & S CA Jan 29 thr Mar 11 2 May 1 thr May 21 5 Aug 28 thr Oct 9 914 S AZ, basin & range Jan 29 thr Mar 11 2 Mar 12 thr May 7 4 Aug 28 thr Sep 25 915 AZ and NM montains Feb 26 thr Apr 23 3 May 22 thr July 16 6 Oct 24 thr Dec 4 1116 Central UT Mar 26 thr May 7 4 June 19 thr Aug 13 7 Sep 12 thr Nov 16 1017 E. NV & W UT Apr 9 thr May 21 5 June 5 thr July 30 6 Sep 12 thr Nov 6 1018 S. ID & N. NV Apr 24 thr June 4 5 June 19 thr Aug 13 7 Sep 26 thr Nov 6 10