Index of IPW Commands
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
- addtime -
add time to a given date and time
- advec -
advected energy for a snowcover
- ah2vp -
convert between absolute humidity and vapor pressure
- akintrp -
interpolate irregular x,y data pairs using Akima's spline method
- albedo -
solar albedo for visible and infrared over snow
- band
- band interleave
- bin2text -
convert binary file of integers to text file
- bitcom -
bitwise combination of pixels (AND, OR, exclusive-OR)
- bmask -
create a basin-delineation mask
- bowvap -
evaporation rate using Bowen ratio
- cf_cloud -
cloud attenuation of beam and diffuse solar radiation
- classeq -
separate pixels into classess defined by equal area histogram
- classify -
separate pixels into classes using ranges of values
- clmask -
make class mask image from an IPW image
- cloud -
estimate cloudcover from tmax, tmin
- cmpimg -
compare two IPW images
- cnhist -
convert IPW histogram to cumulative normalized text file
- cnhist.all -
cumulative normalized histogram of set of IPW images
- convolve -
perform spatial convolution on an IPW image
- crossval -
cross validation of interpolation by 'surface' and 'msurface'
- cvtime -
convert dates and times between different formats
- declass -
replace pixel classes with their representative values
- deltaT -
adjusted diurnal temperature range
- deltaz -
differences from mean-weighted station elevations
- dem2ipw -
convert USGS DEM to IPW image
- demultiplex
- demux -
demultiplex (extract) bands from IPW image
- despike -
remove abnormally large pixel values (spikes)
- dewpt -
dew point temperature from vapor pressure
- dither -
convert IPW image into bilevel image using ordered dithering
- edhdr -
edit headers of an IPW image
- edimg -
edit the pixels of an IPW image
- elevrad -
beam and diffuse radiation from elevation
- extract
- ezint -
time integration or averaging of time,y data pairs
- fillbands -
create bands between two bands using linear interpolation
- flip -
flip an IPW image
- gelevrad -
beam and diffuse irradiance from elevation
- ggradient -
slope and aspect from elevation (global-scale)
- ghorizon -
horizon for one direction (global-scale)
- glob.alb -
global (broadband) solar albedo over snow
- gradient -
slope and aspect from elevation
- grhist -
graph an IPW histogram
- grid2ipw -
convert an Arc/Info image to an IPW image
- gshade -
cosine of illumination angle (global-scale)
- gsnow -
heat flow between snow and soil
- gsunlight -
sun angles: azimuth and zenith angles of sun's position
- gsunweights -
Kronrod quadrature weights and sun angles
- gtoporad -
topographically-corrected solar radiation
- gtoporad.24 -
topographically-corrected solar radiation for 24-hour period
- gtopquad -
daily integrated radiation over a topographic grid
- gviewf -
sky view and terrain configuration factors (global-scale)
- gviewf-mp -
multi-processor version of 'gviewf' command
- hcnx -
extract daily climate data from Historical Climate Network
- hist -
histogram for an IPW image
- histeq -
make histogram-equalization look-up table for IPW histogram
- horizon -
horizon in one direction
- humidx -
mean daily vapor pressure from min & max air temperatures
- iadd -
perform addition or subtraction on pixels (DEPRECIATED)
- ialbedo -
solar albedo for visible and infrared over snow
- idewpt -
dew point temperature from vapor pressure
- iinterp -
linearly interpolate single-band image using set of data pairs
- image
- imath -
calculate an arithmetic expression over each sample's pixels
- imgstat -
statistics for an IPW image
- imgsum -
sum all pixels in an image
- indvi -
normalized difference vegetation index (NDVI)
- interp -
interpolate linearly between x,y data pairs
- ipmx -
latent heat flux (LE) using Penman-Monteith method
- ipott -
sea-level or potential temperature
- iptx -
potential evaporation (PE) using Priestly-Taylor method
- ipw -
list IPW commands by category
- ipw2bin -
convert IPW image to binary file
- ipw2grid -
convert IPW image to Arc/Info image
- ipw2hds -
convert IPW image to HDS sixel format
- ipw2pbm -
convert IPW image to PGM or PPM formats
- ipw2pgm -
convert IPW image to Portable Gray Map (PGM) image
- ipw2ppm -
convert IPW image to Portable Pixel Map (PPM) image
- ipw2ps -
convert IPW image to PostScript
- ipw2sun -
convert IPW image to Sun rasterfile
- ipw2xim -
convert IPW image to xim format
- ipwfile -
print basic info about an IPW image
- ipwinterp -
interpolate IPW image using parameters from 'istatrel' command
- irh2vp -
convert between relative humidity and vapor pressure
- isatvp -
saturation vapor pressure from dew point temperature
- isnobal -
energy-balance snowmelt model with 2 snow layers
- istatgraph -
plot two images and the interpolations from 'istatrel' command
- istatrel -
statistical relation (best fit polynomial) between images
- itrbxfr -
turbulent transfer (H and LE) using Brutsaert's method
- itrim -
trim image values based on min/max threshold (DEPRECIATED)
- lincom -
linear combination of pixels (DEPRECIATED)
- lqhx -
modify an IPW image's linear quantization wth new LQ header
- lqmm -
find minimum and maximum in LQ headers for set of IPW images
- lutx -
transform an IPW image using an IPW lookup table
- mkbih -
make a basic image (BI) header
- mkcrh -
add a class range (CR) header to an image
- mkgeoh -
add a geodetic (GEO) header to an image
- mklqh -
add a linear quantization (LQ) header to an image
- mklut -
make an IPW look-up table
- mkpcp -
make precipitation files for 'snobal' command
- mkpcp_a -
make precip files for 'snobal' command with adj for Ta
- mkpptime -
computes time since last precipitation event for albedo decay computation
- mkprecip -
make precipitation images for 'isnobal' command
- mkproj -
make a projection definition file
- mksath -
add a satellite (SAT) header to an image
- mksunh -
add a solar position (SUN) header to an image
- mkwinh -
add a window (WIN) header to an image
- mse -
moist static energy (MSE)
- mstats -
multivariate statistics for an IPW image
- msurface -
version of 'surface' command optimized for multiple images
- msurfprep -
make nearest-neighbor information for 'msurface' command
- mult -
perform multiplication or division on pixels (DEPRECIATED)
- multiplex
- mux -
multiplex (combine) images into one multi-band image
- ninterp -
linearly interpolate multi-band image over n-dimensional table
- normalize -
normalize image bands
- pbm2ipw -
convert PGM or PPM images to IPW image
- penmanx -
latent heat flux (LE) using Penman-Monteith method
- pix2fp -
map pixel values to floating-point values using image's LQ header
- pmask -
create a pit mask
- pmx -
latent heat flux (LE) using simplified Penman-Monteith method
- poly -
print coordinates of pixels for in a polygon
- pott -
sea-level or potential temperature
- prhdr -
print headers of an IPW image
- primg -
print pixel specified by line,sample coordinates as text
- proport -
compute monthly proportions from daily precipitation data
- ptaylorx -
potential evaporation (PE) using Priestly-Taylor method
- ptx -
potential evaporation (PE) using simplified Priestly-Taylor method
- qdint -
numerical integration of x,y data pairs using a spline fit
- random -
generate random values
- randomize -
randomly shuffle lines of an IPW image
- refdx -
refractive index from wavelengths
- reproj -
reproject an IPW image to a new geographic projection
- reproj_area -
minimum bounding rectangle in a reprojected area
- requant -
modify the linear quantization of an IPW image
- resamp -
resample an IPW image (decrease resolution) by averaging pixels
- rh2vp -
convert between relative humidity and vapor pressure
- rmhdr -
remove headers from an IPW image
- rmsd -
computes model fitting statistics RMSD, ME, and MBD
- rotate -
rotate an IPW image
- satvp -
saturation vapor pressure from dew point temperature
- scale -
multiply all pixels by a scaling factor (DEPRECIATED)
- selevrad -
beam and diffuse radiation from elevation over snow
- seq -
generate sequence of numbers
- shade -
cosine of local illumination angle
- skew -
skew the lines of an IPW image
- sling -
vapor pressure from wet/dry bulb temperatures
- smooth -
smooths a vector using a running average
- snobal -
energy balance snowmelt model with 2 snow layers
- snowmass -
simple snowmelt model based on daily radiation
- soiltmp -
soil layer temperature from min & max air temperatures
- solar -
exoatmospheric direct solar irradiance
- solar_can -
compute below canopy solar radiation (Mel's model)
- srftmp -
soil surface temperature from min & max air temperatures
- stoporad -
topographically-corrected solar radiation over snow
- sunang -
sun angles: azimuth and zenith angles of sun's position
- sunlight -
sunrise and sunset times, and quadrature weights
- surface -
make IPW image by spatially interpolating irregular point data
- svp_slope -
slope of saturation vapor pressure with temperature
- swe -
snow water equivalent (SWE)
- swp -
soil water potential (SWP) and hydaulic conductivities
- tcloud -
cloudiness attenuation of solar radiation
- text2bin -
convert text file with integers to binary file
- text2ipw -
convert text file with data to IPW image
- th_adj -
thermal radiation adjustment for veg, clouds or both
- thermin -
incoming thermal radiation at different elevations
- tmpt -
make IPW image from Thematic Mapper (TM) image on tape
- toporad -
topographically-corrected solar radiation
- toporad.24 -
topographically-corrected solar radiation for 24-hour period
- topotherm -
atmospheric thermal radiation over a topographic grid
- topquad -
daily integrated radiation over a topographic grid
- trad -
incoming thermal radiation at one elevation
- trad_can -
compute below canopy thermal radiation (Mel's model)
- transcoord -
translate coordinates between geographic projections
- transpose -
transpose the lines and samples of an IPW image
- trb_Ri -
turbulent transfer (H and LE) using Businger-Dyer model
- trbxfr -
turbulent transfer (H and LE) using Brutsaert's method
- twostream -
two-stream radiative transfer model of a homogeneous layer
- viewf -
sky view and terrain configuration factors
- vp2sph -
convert between vapor pressure and specific humidity
- vptr -
vapor pressure from thermal radiation
- wbal -
simple water balance model
- wedge -
linear combination of line and sample coordinates
- weights -
calculates x-interval weights for selected x-y integration segment
- window -
extract a region (window) of an IPW image
- zoom -
enlarge or reduce an IPW image by replication or subsampling
- zpr -
air pressure from elevation
IPW documentation /
Last revised 3 June 2009 /
IPW web site