geo-utils | chickadee

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Documentation

API for constructing and manipulating geographic data.

Module geopoint

Usage

(require-extension geopoint)

Argument Conventions

GP: geopoint.
LAT: latitude real.
LON: longitude real.

Module geobox

Usage

(require-extension geobox)

make-geobox

make-geobox GP-MIN GP-MAXprocedure

check-geobox

check-geobox LOC OBJ #!optional VARNAMprocedure

error-geobox

error-geobox LOC OBJ #!optional VARNAMprocedure

geopoint-within-box

geopoint-within-box GP GBprocedure

Module geopolygon

Usage

(require-extension geopolygon)

make-geopolygon

make-geopolygon GP ...procedure: GP is a geopoint.

make-geopolygon GPSprocedure: GPS is (or (list-of geopoint) (vector-of geopoint)).

check-geopolygon

check-geopolygon LOC OBJ #!optional VARNAMprocedure

error-geopolygon

error-geopolygon LOC OBJ #!optional VARNAMprocedure

geopolygon-closed?

geopolygon-closed? GPOLYprocedure: Polygon has the same initial and final geopoint.

geopolygon-open?

geopolygon-open? GPOLYprocedure: Polygon does not have the same initial and final geopoint.

geopolygon-bounding-box

geopolygon-bounding-box GPOLYprocedure

Module geopoint-utils

Usage

(require-extension geopoint-utils)

geopoint-in-closed-polygon?

(geopoint-in-closed-polygon? GP GPOLY [INTERSECTS? intersects?-pnp]) => booleanprocedure

Is the (: GP geopoint) in the (: GPOLY (or (vector-of geopoint) (list-of geopoint)))?

INTERSECTS? is a (procedure ((: PI geopoint) (: PJ geopoint) (: LAT real) (: LON real)) => boolean) testing for ray intersection.

Treats an open geopolygon as closed.

intersects?-pnp

intersects?-pnp PI PJ LAT LONprocedure

intersects?-pip

intersects?-pip PI PJ LAT LONprocedure

Module geo-utils

Usage

(require-extension geo-utils)

pythagorean-distance

pythagorean-distance LAT1 LON1 LAT2 LON2procedure

pythagorean-distance*

pythagorean-distance* LAT1 LON1 LAT2 LON2procedure

spherical-surface-distance

(spherical-surface-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => realprocedure

great-circle-distance

(great-circle-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => realprocedure

great-circle-distance-radians

(great-circle-distance-radians LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => realprocedure

approximate-ellipsoid-distance

(approximate-ellipsoid-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS) (F EARTH-FLATTENING)) => realprocedure

great-circle-azimuth

(great-circle-azimuth LAT1 LON1 LAT2 LON2 [PREC 5]) => realprocedure

great-circle-position

(great-circle-position LAT LON DIS AZI (R EARTH-RADIUS-KILOMETERS)) => (values latitude longitude)procedure

Module geo-dms

Usage

(require-extension geo-dms)

Argument Conventions

D: degrees real.
M: minutes real.
S: seconds real.
DEG: degreesreal.
LAT?: latitude? boolean.
PAD: padding between elements string.
LEADING-DIR?: compass direction is prefix?

degree-minute-second-text

degree-minute-second-text #!optional DMS-TEXTprocedure: DMS-TEXT is a 3 element list of string of the form (<degrees suffix> <minutes suffix> <seconds suffix>).

degree->dms

degree->dms DEGprocedure: Returns the degree+minutes+seconds for the degrees DEG.

dms->string

(dms->string D M S [LAT? [LEADING-DIR? [PAD ""]]]) => stringprocedure: Example: 122°45'10"W

dms->string*

(dms->string* D M S [PAD ""]) => stringprocedure: Example: 122°45'10"

string-dms->degree

string-dms->degree STR #!optional LAT?procedure: Returns the degrees for string form of dms STR.

string->degree

string->degree STR #!optional LAT?procedure: Synonym of string-dms->degree.

degree->string

(degree->string DEG [LAT? [LEADING-DIR? [PAD ""]]]) => stringprocedure: Returns the dms-string for the degrees DEG.

Module globe

Usage

(require-extension geo-globe)

make-globe

make-globe RADIUS FLATTENINGprocedure

check-globe

check-globe LOC OBJ #!optional VARNAMprocedure

error-globe

error-globe LOC OBJ #!optional VARNAMprocedure

globe-radius-kilometers

globe-radius-kilometers GLOBEprocedure

globe-flattening-factor

globe-flattening-factor GLOBEprocedure

spherical-surface-distance

spherical-surface-distance GLOBE GP1 GP2procedure

great-circle-distance

great-circle-distance GLOBE GP1 GP2procedure

great-circle-distance-radians

great-circle-distance-radians GLOBE GP1 GP2procedure

approximate-ellipsoid-distance

approximate-ellipsoid-distance GLOBE GP1 GP2procedure

great-circle-azimuth

(great-circle-azimuth GP1 GP2 [PRECISION 5]) => numberprocedure

great-circle-position

great-circle-position GLOBE GP DISTANCE AZIMUTHprocedure

Module earth

Usage

(require-extension geo-earth)

earth-flattening

<variable>*earth-flattening* => real</variable>

earth-radius-miles

<variable>*earth-radius-miles* => real</variable>

earth-radius-kilometers

<variable>*earth-radius-kilometers* => real</variable>

Notes

The relational predicates are rather useless.
Incomplete.

Requirements

miscmacros moremacros numbers mathh vector-lib check-errors

setup-helper test

Version history

0.5.0: Add earth.
0.4.0: SI default. Add globe.
0.3.2: Uses numbers.
0.3.1: Uses test.
0.3.0: .
0.2.0: .
0.1.1: .
0.1.0: Hello

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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