geo-utils

Geographic Utilities

  1. geo-utils
  2. Documentation
    1. Module geopoint
      1. Usage
      2. Argument Conventions
      3. make-geopoint
      4. geopoint?
      5. check-geopoint
      6. error-geopoint
      7. geopoint-latitude
      8. geopoint-longitude
      9. geopoint-strictly-above?
      10. geopoint-above?
      11. geopoint-strictly-below?
      12. geopoint-below?
      13. geopoint-strictly-left?
      14. geopoint-left?
      15. geopoint-strictly-right?
      16. geopoint-right?
      17. geopoint=
      18. geopoint<
      19. geopoint>
      20. geopoint<=
      21. geopoint>=
    2. Module geobox
      1. Usage
      2. Argument Conventions
      3. make-geobox
      4. geobox?
      5. check-geobox
      6. error-geobox
      7. geobox-minimum
      8. geobox-maximum
      9. geobox=
      10. geobox<
      11. geobox>
      12. geobox<=
      13. geobox>=
      14. geopoint-within-box
    3. Module geopolygon
      1. Usage
      2. Argument Conventions
      3. make-geopolygon
      4. geopolygon?
      5. check-geopolygon
      6. error-geopolygon
      7. geopolygon
      8. geopolygon-closed?
      9. geopolygon-open?
      10. geopolygon-bounding-box
    4. Module geopoint-utils
      1. Usage
      2. geopoint-in-closed-polygon?
      3. intersects?-pnp
      4. intersects?-pip
    5. Module geo-utils
      1. Usage
      2. *earth-flattening*
      3. *earth-radius-miles*
      4. *earth-radius-kilometers*
      5. pythagorean-distance
      6. pythagorean-distance*
      7. spherical-surface-distance
      8. great-circle-distance
      9. great-circle-distance-radians
      10. approximate-ellipsoid-distance
      11. great-circle-azimuth
      12. great-circle-position
    6. Module geo-dms
      1. Usage
      2. Argument Conventions
      3. degree-minute-second-text
      4. dms->degree
      5. degree->dms
      6. dms->string
      7. dms->string*
      8. string-dms->degree
      9. string->degree
      10. degree->string
    7. Module globe
      1. Usage
      2. make-globe
      3. make-earth
      4. globe?
      5. check-globe
      6. error-globe
      7. globe-radius-kilometers
      8. globe-flattening-factor
      9. spherical-surface-distance
      10. great-circle-distance
      11. great-circle-distance-radians
      12. approximate-ellipsoid-distance
      13. great-circle-azimuth
      14. great-circle-position
  3. Bugs & Limitations
  4. Notes
  5. Requirements
  6. Author
  7. Version history
  8. License

Documentation

API for constructing and manipulating geographic data.

Module geopoint

Usage

(require-extension geopoint)

Argument Conventions

GP
geopoint.
LAT
latitude real.
LON
longitude real.

make-geopoint

[procedure] (make-geopoint LAT LON) => geopoint

geopoint?

[procedure] (geopoint? OBJ) => boolean

check-geopoint

[procedure] (check-geopoint LOC OBJ [VARNAM]) => geopoint

error-geopoint

[procedure] (error-geopoint LOC OBJ [VARNAM])

geopoint-latitude

[procedure] (geopoint-latitude GP) => real

geopoint-longitude

[procedure] (geopoint-longitude GP) => real

geopoint-strictly-above?

[procedure] (geopoint-strictly-above? GP1 GP2) => boolean

geopoint-above?

[procedure] (geopoint-above? GP1 GP2) => boolean

geopoint-strictly-below?

[procedure] (geopoint-strictly-below? GP1 GP2) => boolean

geopoint-below?

[procedure] (geopoint-below? GP1 GP2) => boolean

geopoint-strictly-left?

[procedure] (geopoint-strictly-left? GP1 GP2) => boolean

geopoint-left?

[procedure] (geopoint-left? GP1 GP2) => boolean

geopoint-strictly-right?

[procedure] (geopoint-strictly-right? GP1 GP2) => boolean

geopoint-right?

[procedure] (geopoint-right? GP1 GP2) => boolean

geopoint=

[procedure] (geopoint= GP1 GP2) => boolean

geopoint<

[procedure] (geopoint< GP1 GP2) => boolean

geopoint>

[procedure] (geopoint> GP1 GP2) => boolean

geopoint<=

[procedure] (geopoint<= GP1 GP2) => boolean

geopoint>=

[procedure] (geopoint>= GP1 GP2) => boolean

Module geobox

Usage

(require-extension geobox)

Argument Conventions

GB
geobox.

make-geobox

[procedure] (make-geobox GP-MIN GP-MAX) => geobox

geobox?

[procedure] (geobox? OBJ) => boolean

check-geobox

[procedure] (check-geobox LOC OBJ [VARNAM]) => geobox

error-geobox

[procedure] (error-geobox LOC OBJ [VARNAM])

geobox-minimum

[procedure] (geobox-minimum GB) => geopoint

geobox-maximum

[procedure] (geobox-maximum GB) => geopoint

geobox=

[procedure] (geobox= GB1 GB2) => boolean

geobox<

[procedure] (geobox< GB1 GB2) => boolean

geobox>

[procedure] (geobox> GB1 GB2) => boolean

geobox<=

[procedure] (geobox<= GB1 GB2) => boolean

geobox>=

[procedure] (geobox>= GB1 GB2) => boolean

geopoint-within-box

[procedure] (geopoint-within-box GP GB) => boolean

Module geopolygon

Usage

(require-extension geopolygon)

Argument Conventions

GPOLY
geopolygon.

make-geopolygon

[procedure] (make-geopolygon GP ...) => geopolygon

GP is a geopoint.

[procedure] (make-geopolygon GPS) => geopolygon

GPS is (or (list-of geopoint) (vector-of geopoint)).

geopolygon?

[procedure] (geopolygon? OBJ) => boolean

check-geopolygon

[procedure] (check-geopolygon LOC OBJ [VARNAM]) => geopolygon

error-geopolygon

[procedure] (error-geopolygon LOC OBJ [VARNAM])

geopolygon

[procedure] (geopolygon GP...) => geopolygon

geopolygon-closed?

[procedure] (geopolygon-closed? GPOLY) => boolean

Polygon has the same initial and final geopoint.

geopolygon-open?

[procedure] (geopolygon-open? GPOLY) => boolean

Polygon does not have the same initial and final geopoint.

geopolygon-bounding-box

[procedure] (geopolygon-bounding-box GPOLY) => geobox

Module geopoint-utils

Usage

(require-extension geopoint-utils)

geopoint-in-closed-polygon?

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

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

[procedure] (intersects?-pnp PI PJ LAT LON) => boolean

intersects?-pip

[procedure] (intersects?-pip PI PJ LAT LON) => boolean

Module geo-utils

Usage

(require-extension geo-utils)

*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>

pythagorean-distance

[procedure] (pythagorean-distance LAT1 LON1 LAT2 LON2) => real

pythagorean-distance*

[procedure] (pythagorean-distance* LAT1 LON1 LAT2 LON2) => real

spherical-surface-distance

[procedure] (spherical-surface-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => real

great-circle-distance

[procedure] (great-circle-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => real

great-circle-distance-radians

[procedure] (great-circle-distance-radians LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS)) => real

approximate-ellipsoid-distance

[procedure] (approximate-ellipsoid-distance LAT1 LON1 LAT2 LON2 (R EARTH-RADIUS-KILOMETERS) (F EARTH-FLATTENING)) => real

great-circle-azimuth

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

great-circle-position

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

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

[procedure] (degree-minute-second-text [DMS-TEXT]) => (list-of string)

DMS-TEXT is a 3 element list of string of the form (<degrees suffix> <minutes suffix> <seconds suffix>).

dms->degree

[procedure] (dms->degree D M S) => real

degree->dms

[procedure] (degree->dms DEG) => (values D M S)

Returns the degree+minutes+seconds for the degrees DEG.

dms->string

[procedure] (dms->string D M S [LAT? [LEADING-DIR? [PAD ""]]]) => string

Example: 122°45'10"W

dms->string*

[procedure] (dms->string* D M S [PAD ""]) => string

Example: 122°45'10"

string-dms->degree

[procedure] (string-dms->degree STR [LAT?]) => real

Returns the degrees for string form of dms STR.

string->degree

[procedure] (string->degree STR [LAT?]) => real

Synonym of string-dms->degree.

degree->string

[procedure] (degree->string DEG [LAT? [LEADING-DIR? [PAD ""]]]) => string

Returns the dms-string for the degrees DEG.

Module globe

Usage

(require-extension globe)

make-globe

[procedure] (make-globe RADIUS FLATTENING) => globe

make-earth

[procedure] (make-earth) => globe

globe?

[procedure] (globe? OBJ) => boolean

check-globe

[procedure] (check-globe LOC OBJ [VARNAM]) => globe

error-globe

[procedure] (error-globe LOC OBJ [VARNAM])

globe-radius-kilometers

[procedure] (globe-radius-kilometers GLOBE) => number

globe-flattening-factor

[procedure] (globe-flattening-factor GLOBE) => number

spherical-surface-distance

[procedure] (spherical-surface-distance GLOBE GP1 GP2) => number

great-circle-distance

[procedure] (great-circle-distance GLOBE GP1 GP2) => number

great-circle-distance-radians

[procedure] (great-circle-distance-radians GLOBE GP1 GP2) => number

approximate-ellipsoid-distance

[procedure] (approximate-ellipsoid-distance GLOBE GP1 GP2) => number

great-circle-azimuth

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

great-circle-position

[procedure] (great-circle-position GLOBE GP DISTANCE AZIMUTH) => geopoint

Bugs & Limitations

Notes

Requirements

miscmacros moremacros numbers mathh vector-lib check-errors

setup-helper test

Author

Kon Lovett

Version history

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

License

Copyright (C) 2017 Kon Lovett. All rights reserved.

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.