# Maize Cropping Systems Mapping Using RapidEye Observations in Agro-Ecological Landscapes in Kenya
## 3 Methodology
### Field Data Collection
\begin{table}
\begin{tabular}{l c c c} \hline \hline \multicolumn{1}{c}{**Name**} & **Index** & **Formula** & **Reference** \\ \hline Canopy Chlorophyll Content Index & CCCI & \(((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/\big{(}\text{R}_{\text{ RINE}}+\text{R}_{\text{end,edge}}\big{)}/((\text{R}_{\text{RINE}}-\text{R}_{\text{end}})/(\text{R}_{ \text{RINE}}+\text{R}_{\text{end}})\)) & [28] \\ Normalized Difference Red-Edge & NDRE & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{RINE}}+\text{R}_{ \text{end,edge}})\) & [29] \\ Transformed Soil Adjusted Vegetation Index & TSAVI & \(\text{B}(\text{R}_{\text{RINE}}-\text{B}_{\text{end,edge}}-\text{A})/(\text{R}_{ \text{end}}+\text{B}(\text{R}_{\text{RINE}}-\text{A})+\text{X}(1+\text{B}^{2})\) & [30] \\ Soil Adjusted Vegetation Index Red-Edge & SAVI-edge & \(1.5*(\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{ RINE}}-\text{R}_{\text{end,edge}}+\text{0.5})\) & [31] \\ Leaf Chlorophyll Index & LCI & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{RINE}}+ \text{R}_{\text{end}}+\text{0.5})\) & [32] \\ Soil Adjusted Vegetation Index & SAMVI & \(1.5*(\text{R}_{\text{RINE}}-\text{R}_{\text{end}})/(\text{R}_{\text{RINE}}+ \text{R}_{\text{end}}+\text{0.5})\) & [33] \\ Normalized Difference Vegetation Index & NDVI & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end}})/(\text{R}_{\text{RINE}}+\text{R}_{ \text{end}})\) & [33] \\ Difference Vegetation Index & DVI & \(\text{R}_{\text{RINE}}-\text{R}_{\text{end}}\) & [33] \\ Rationalized Normal Difference Vegetation Red-Edge Index & BNDVI-edge & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end}})/(\text{R}_{\text{RINE}}-\text{R} _{\text{end}})^{1/2}\) & [32] \\ Simple Ratation & SR & \(\text{R}_{\text{RINE}}\) & [34] \\ Chlorophyll Green & ChipGreen & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})^{-1}\) & [35] \\ Chlorophyll Red-Edge & CRIRed-edge & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})^{-1}\) & [35] \\ Green Normalized Difference Vegetation & GNDM & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{RINE}}+ \text{R}_{\text{green}})\) & [36] \\ Simple Ratto \(67/550\) CutTS & SR672/550 & \(\text{R}_{\text{end,edge}}/\text{R}_{\text{green}}\) & [37] \\ Simple Ratto \(695/07\) Cutter 5 & Cr5 & \(\text{R}_{\text{end,edge}}/\text{R}_{\text{red}}\) & [38] \\ Simple Ratto \(170/760\) Cutter 4 & Cr4 & Cr4 & \(\text{R}_{\text{end,edge}}/\text{R}_{\text{RINE}}\) & [38] \\ Wide Dynamic Range Vegetation Index & WDVI & \((\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(0.18_{\text{RINE}}+\text{R}_{ \text{end,edge}})\) & [39] \\ Enhanced Vegetation Index & EVI & \(2.5*(\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{RINE}}+ 2.48_{\text{R,edge}}+1)\) & [39] \\ Modified Chlorophyll Algorithm Ratio Index & MCARI & \(((\text{R}_{\text{RINE}}-\text{R}_{\text{end}})-0.2\big{(}\text{R}_{\text{end,edge}}+ \text{R}_{\text{green}}\big{)}\backslash\text{R}_{\text{end}}/\text{R}_{ \text{end}}\) & [40] \\ Rationalized Normal Difference Vegetation Index & RNDVI & \(\Big{(}\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}}\Big{)}/\Big{(}\text{R}_{ \text{RINE}}-\text{R}_{\text{end,edge}}\Big{)}^{1/2}\) & [41] \\ Disease Water Stress Index & DSWI-4 & \(\text{R}_{\text{green}}/\text{R}_{\text{end}}\) & [41] \\ Modified Chlorophyll Algorithm Ratio Index & MCARI & \(\text{Structure Intensive Primer Index 3}\) & SPH3 & \((\text{R}_{\text{RINE}}-\text{R}_{\text{base}})/(\text{R}_{\text{RINE}}+\text{R}_{ \text{end}})\) & [42] \\ Anthropogram Reflectance Index & ARI-edge & \((1/\text{R}_{\text{green}})-(1/\text{R}_{\text{end,edge}})\) & [43] \\ Disease Water Stress Red-edge Index & DSWI-edge & \((\text{R}_{\text{RINE}}-\text{R}_{\text{base}})/(\text{R}_{\text{RINE}}+\text{R}_{ \text{end,edge}})\) & [42] \\ Structure Intensive Primer Index 2 & SPH2 & \((\text{R}_{\text{RINE}}-\text{R}_{\text{base}})/(\text{R}_{\text{RINE}}+\text{R}_{ \text{end,edge}}+1)\) & [42] \\ Enhanced Vegetation Index Red-Edge 2 & EVI-edge 2 & \(2.5*(\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{RINE}}+ 2.48_{\text{R,edge}}+1)\) & [40] \\ Transformed Soil Adjusted Vegetation Index Red-Edge & TNAVI-edge & \(\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}}\) & \(\text{A}/(\text{R}_{\text{end,edge}}+\text{0}(\text{R}_{\text{RINE}}-\text{A})+ \text{X}(1+\text{B}^{2})\) \\ Difference Vegetation Index Red-Edge & DVI-edge & \(\text{R}_{\text{RINE}}-\text{R}_{\text{end,edge}}\) & \((\text{A})\) \\ Green Leaf Index & \(2(\text{R}_{\text{green}}-\text{R}_{\text{end,edge}})/(\text{R}_{\text{end,edge}}+ \text{R}_{\text{RINE}})\) & [40] \\ \hline \hline \end{tabular}  
* Notes \(\text{R}_{\text{RINE}}\), \(\text{R}_{\text{green}}\), \(\text{R}_{\text{end,edge}}\), \(\text{R}_{\text{end,edge}}\) and \(\text{R}_{\text{RINE}}\) are surface reflectance value at blue (band 1) green (band 2), red (band 3), red-edge (band 4) and near infrared (band 5) of RapidEye. The parameters for Transformed Soil Adjusted Vegetation Index (TSAVI) slope of the soil line (A) = 1.2, interpret of the soil line (B) = 0.04 and adjustment factor(0) = 0.08.  
\end{table}