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Manual FOR Anthropogenic Ecotope Mapping (AEM)
Web Version 1.0 (alpha) February 2006
Overview
This document is a printable manual for use in Level 1
Anthropogenic Ecotope
Mapping & Classification (AEM;
Ellis et. al. 2006) using ArcGIS
software (version 9.0 or greater) and the supporting materials
described below. It is not intended as a stand alone
document: use of this manual assumes that standardized
training in the AEM system
has been provided by a qualified instructor.
Proper citation of this document:
Ellis, Erle C. 2006. Concepts for Anthropogenic Ecotope Mapping
(AEM) (Version 1.0). Ecotope.org. February 2006. The Ecotope Mapping
Working Group. <Date of Access> <http:/www.ecotope.org/aem/training/aem_concepts.htm>.
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Table of Contents
- Introduction
- Mapping Overview
- Mapping Levels
- Current Mapping
- Historical Mapping
- Mapping Strategy
- References
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- ArcMap & ArcCatalog 9.0 (or better) on a Windows computer.
- ArcGIS Templates: file locations in Data_Structure
- Geodatabase and feature class templates
- ArcMap editing document
- Sample cell (area frame) shapefiles for area of interest (AOI).
- Orthorectified imagery for AOI meeting minimum data quality standards.
- Assistance of local land managers.
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- Ecotope Mapping Concepts. A printable web-based document
introducing the basic concepts behind
AEM.
- ecotope_classes.xls: database of all classes for ecotope
classification.
- GROUP_key.pdf: details of GROUP+TYPE classification
- key_to_complex_features.pdf: methods for classifying and
mapping small and complex features.
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- Prepare ecotope geodatabase and map templates
for sample cell.
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In the site data folder for your site (\site_name\),
create a new folder for the sample cell named r##_c##,
with ##'s representing the site RC code for the
individual sample cell.
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Copy the geodatabase ecotope_template.mdb to the
folder (use ArcCatalog). (see Data_Structure).
Rename it: site_name_r##_c##_l1_ecotope_map.mdb.
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Copy ecotope_edit.mxd to the directory and rename it:
site_name_r##_c##_l1_ecotope_map.mxd
- Define the sample cell extent and location.
- Create and
define the projection of feature datasets.
- Create new feature dataset: AOI".
- Set the extent and projection (this is very important!):
- Right click the AOI feature dataset and click
Properties>Edit>Import>
- Browse to the 50 m buffered sample cell extent shapefile for
your sample cell (AOI) and click Add and OK.
- Copy, paste, and rename the AOI feature dataset to create ecotope feature datasets with the same projection and
extent.
- Import the sample cell extent (AOI) and 50 m AOI buffer
shapefiles into the AOI feature dataset of the geodatabase.
- Import ecotope_time_1 feature class from
ecotope_files.mdb into the ecotope feature dataset.
- Rename this first version of your ecotope map using the year
of current mapping (depending on the application this will
either be the year of image acquisition and/or the year of groundtruthing). This will be referred to subsequently in
this manual as ecotope_time_1_v1. Example for 2005:
ecotope_2005_v1.
- Right click on ecotope_time_1_v1>Properties>Fields>SITE_R_C>
and change the Default value to the SITE_R_C code for the
sample cell (r##_c##).
- Set topology for ecotope map editing
- RRight click on the ecotope feature dataset and select
New>Topology.
- Name the topology ecotope_topology.
- Set the cluster tolerance to 0.1 m.
- Select the ecotope_time_1_v1 feature class to participate
in the topology.
- Click next twice to enter default values.
- Click on Add Rule to add topologies:
- Must not overlap
- Must not have gaps
- Click next and subsequent options to build and validate
the topology.
- Set up the ArcMap Document for editing
- Open site_name_r##_c##_l1_ecotope_map.mxd
- Add the sample cell extent (AOI) and 50 m AOI buffer feature
classes.
- Add the ecotope_time_1_v1 feature class
- Start Editing
- >Set Selectable Layers: uncheck the AOI feature classes so
that these cannot be edited.
- Symbolize AOIs: hollow: AOI in red, AOI buffer in purple.
- Set the snapping:
- Edge and Vertex of ecotope_time_1_v1
- NOTE: it may be necessary to change edge and vertex snapping
while drawing features to get optimal topology.
- Set the Target layer for editing: ecotope_time_1_v1
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Add imagery for the sample cell.
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Interpret and edit ecotope features
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Draw each feature based on the correct minimum mapping
scales and in the correct sequence.
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If you are unsure of this, consult with an expert ecotope
mapper. More information is also available in
the
training section.
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Attribute the mapped features (you may do this as you
draw the features, or later).
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Open the attribute editor box.
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Select the correct classification attributes for every level
of the ecotope feature
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Note that the attribute will appear using its text name,
but will be added to the database of the feature using its
code, not its text name.
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FORM>USE>COVER>GROUP+TYPE:
See the
Classification section for details.
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Ecotope codes can be viewed and experimented using the
Check Ecotopes section.
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(UPDATE) The full set of codes is also available in
ecotope_classes.xls, with more description of GROUP+TYPE
classes in the GROUP_key.pdf.
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Symbolize the ecotope maps.
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Calculate the UC and ecotope fields.
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Right click on the layer in the table of contents and
select the option.
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Symbolize features using USE+COVER Symbology for the UC
field.
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Use the Match Symbols method and use_cover_symbology.style.
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ADD Labels: ecotope attribute./p>
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- (not yet available)
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X:\
= local file path for GIS data, to be used for ecotope mapping.
use_cover_symbology.style = USE+COVER symbology style for ArcMap.
ecotope_template\
Directory for ecotope geodatabase templates.
ecotope_template.mdb = template file for ecotope
geodatabase structure.
ecotope_files.mdb = template file for ecotope feature
classes.
ecotope_edit.mxd = ArcMap document with tools and
settings for ecotope mapping.
site_name\
Directory for site data.
\aoi\ Shapefiles outlining the Area of Interest (AOI).
site_name_r##_c##_aoi.shp = shapefile (UTM): sample
cell polygon.
site_name_r##_c##_aoi_50m_buffer.shp = shapefile (UTM):
50 m buffer of sample cell polygon.
\imagery\ Imagery for the site.
\aerials\ Aerial
photographs for the site.
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Ellis E. C., H. Wang, H. Xiao, K. Peng, X. P. Liu, S. C.
Li, H. Ouyang, X. Cheng, and L. Z. Yang. 2006. Measuring long-term ecological
changes in densely populated landscapes using current and historical high resolution
imagery. Remote Sensing of Environment 100(4):457-473. [download]
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