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The data retrieval URL, a find request, provides access to COVAR_SPAT and COVAR_FRAGSTAT layer data via latitude/longitude parameters, or a global unique identifier parameter for a single observation record. The find request will accept parameters to query for a single COVAR layer value, all layers in a specific COVAR table, or all layer values in the COAVR COVAR schema for a particular lat/lon or GlobalUniqueID. A find request will also accept a format parameter that specifies a response data format of XML or CSV.
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Example Value | Description |
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CSV Result Formats
Response to a well-formed
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find request
Description | Name | Line Number | Format | Example Value |
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Status | Status | 1 | Text terminated by a newline | DATA |
Header | Copyright | 2 | Text terminated by a newline | Copyright 2009 Cornell Lab of Ornithology http://www.birds.cornell.edu |
| Data Policy | 3 | Text terminated by a newline | AKN Data Sharing Policy http://www.avianknowledge.net/content/about/akn-data-sharing-policy |
| Number of records returned | 4 | Text terminated by a newline | RECORD COUNT=316 |
Separator | Blank Line | 5 | newline |
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Field Listing | Field Listing | 6 | Comma separated text terminated by a newline | FIELD NAME, DESCRIPTIVE NAME, SOURCE TABLE NAME |
Field data | Field data | 7 to end of data | Comma separated text terminated by a newline | AI, Aggregation Index (Fragstats), COVAR_FS_CLASS_NLCD2001 |
Response to a mal-formed
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find request
Description | Name | Line Number | Format | Example Value |
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Status | Status | 1 | Text terminated by a newline | ERROR |
Header | Request Parameters | 2 | Text terminated by a newline | REQUEST PARAMETERS=format=csv&match= |
| Errors | 3 - N | Text terminated by a newline | A well-formed metadata request includes a match=layer_name query parameter (i.e. match=CAUS_PREC0101). |
Separator | Blank Line | N + 1 | newline |
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